diff options
Diffstat (limited to 'ffmpeg1/libavformat/avidec.c')
| -rw-r--r-- | ffmpeg1/libavformat/avidec.c | 1614 |
1 files changed, 0 insertions, 1614 deletions
diff --git a/ffmpeg1/libavformat/avidec.c b/ffmpeg1/libavformat/avidec.c deleted file mode 100644 index f6eb71e..0000000 --- a/ffmpeg1/libavformat/avidec.c +++ /dev/null @@ -1,1614 +0,0 @@ -/* - * AVI demuxer - * Copyright (c) 2001 Fabrice Bellard - * - * This file is part of FFmpeg. - * - * FFmpeg is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * FFmpeg is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "libavutil/intreadwrite.h" -#include "libavutil/mathematics.h" -#include "libavutil/bswap.h" -#include "libavutil/opt.h" -#include "libavutil/dict.h" -#include "libavutil/avstring.h" -#include "libavutil/avassert.h" -#include "avformat.h" -#include "internal.h" -#include "avi.h" -#include "dv.h" -#include "riff.h" - -typedef struct AVIStream { - int64_t frame_offset; /* current frame (video) or byte (audio) counter - (used to compute the pts) */ - int remaining; - int packet_size; - - uint32_t scale; - uint32_t rate; - int sample_size; /* size of one sample (or packet) (in the rate/scale sense) in bytes */ - - int64_t cum_len; /* temporary storage (used during seek) */ - - int prefix; ///< normally 'd'<<8 + 'c' or 'w'<<8 + 'b' - int prefix_count; - uint32_t pal[256]; - int has_pal; - int dshow_block_align; ///< block align variable used to emulate bugs in the MS dshow demuxer - - AVFormatContext *sub_ctx; - AVPacket sub_pkt; - uint8_t *sub_buffer; - - int64_t seek_pos; -} AVIStream; - -typedef struct { - const AVClass *class; - int64_t riff_end; - int64_t movi_end; - int64_t fsize; - int64_t io_fsize; - int64_t movi_list; - int64_t last_pkt_pos; - int index_loaded; - int is_odml; - int non_interleaved; - int stream_index; - DVDemuxContext* dv_demux; - int odml_depth; - int use_odml; -#define MAX_ODML_DEPTH 1000 - int64_t dts_max; -} AVIContext; - - -static const AVOption options[] = { - { "use_odml", "use odml index", offsetof(AVIContext, use_odml), AV_OPT_TYPE_INT, {.i64 = 1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM}, - { NULL }, -}; - -static const AVClass demuxer_class = { - .class_name = "avi", - .item_name = av_default_item_name, - .option = options, - .version = LIBAVUTIL_VERSION_INT, - .category = AV_CLASS_CATEGORY_DEMUXER, -}; - - -static const char avi_headers[][8] = { - { 'R', 'I', 'F', 'F', 'A', 'V', 'I', ' ' }, - { 'R', 'I', 'F', 'F', 'A', 'V', 'I', 'X' }, - { 'R', 'I', 'F', 'F', 'A', 'V', 'I', 0x19}, - { 'O', 'N', '2', ' ', 'O', 'N', '2', 'f' }, - { 'R', 'I', 'F', 'F', 'A', 'M', 'V', ' ' }, - { 0 } -}; - -static const AVMetadataConv avi_metadata_conv[] = { - { "strn", "title" }, - { 0 }, -}; - -static int avi_load_index(AVFormatContext *s); -static int guess_ni_flag(AVFormatContext *s); - -#define print_tag(str, tag, size) \ - av_dlog(NULL, "%s: tag=%c%c%c%c size=0x%x\n", \ - str, tag & 0xff, \ - (tag >> 8) & 0xff, \ - (tag >> 16) & 0xff, \ - (tag >> 24) & 0xff, \ - size) - -static inline int get_duration(AVIStream *ast, int len){ - if(ast->sample_size){ - return len; - }else if (ast->dshow_block_align){ - return (len + ast->dshow_block_align - 1)/ast->dshow_block_align; - }else - return 1; -} - -static int get_riff(AVFormatContext *s, AVIOContext *pb) -{ - AVIContext *avi = s->priv_data; - char header[8]; - int i; - - /* check RIFF header */ - avio_read(pb, header, 4); - avi->riff_end = avio_rl32(pb); /* RIFF chunk size */ - avi->riff_end += avio_tell(pb); /* RIFF chunk end */ - avio_read(pb, header+4, 4); - - for(i=0; avi_headers[i][0]; i++) - if(!memcmp(header, avi_headers[i], 8)) - break; - if(!avi_headers[i][0]) - return AVERROR_INVALIDDATA; - - if(header[7] == 0x19) - av_log(s, AV_LOG_INFO, "This file has been generated by a totally broken muxer.\n"); - - return 0; -} - -static int read_braindead_odml_indx(AVFormatContext *s, int frame_num){ - AVIContext *avi = s->priv_data; - AVIOContext *pb = s->pb; - int longs_pre_entry= avio_rl16(pb); - int index_sub_type = avio_r8(pb); - int index_type = avio_r8(pb); - int entries_in_use = avio_rl32(pb); - int chunk_id = avio_rl32(pb); - int64_t base = avio_rl64(pb); - int stream_id= 10*((chunk_id&0xFF) - '0') + (((chunk_id>>8)&0xFF) - '0'); - AVStream *st; - AVIStream *ast; - int i; - int64_t last_pos= -1; - int64_t filesize= avi->fsize; - - av_dlog(s, "longs_pre_entry:%d index_type:%d entries_in_use:%d chunk_id:%X base:%16"PRIX64"\n", - longs_pre_entry,index_type, entries_in_use, chunk_id, base); - - if(stream_id >= s->nb_streams || stream_id < 0) - return AVERROR_INVALIDDATA; - st= s->streams[stream_id]; - ast = st->priv_data; - - if(index_sub_type) - return AVERROR_INVALIDDATA; - - avio_rl32(pb); - - if(index_type && longs_pre_entry != 2) - return AVERROR_INVALIDDATA; - if(index_type>1) - return AVERROR_INVALIDDATA; - - if(filesize > 0 && base >= filesize){ - av_log(s, AV_LOG_ERROR, "ODML index invalid\n"); - if(base>>32 == (base & 0xFFFFFFFF) && (base & 0xFFFFFFFF) < filesize && filesize <= 0xFFFFFFFF) - base &= 0xFFFFFFFF; - else - return AVERROR_INVALIDDATA; - } - - for(i=0; i<entries_in_use; i++){ - if(index_type){ - int64_t pos= avio_rl32(pb) + base - 8; - int len = avio_rl32(pb); - int key= len >= 0; - len &= 0x7FFFFFFF; - -#ifdef DEBUG_SEEK - av_log(s, AV_LOG_ERROR, "pos:%"PRId64", len:%X\n", pos, len); -#endif - if(url_feof(pb)) - return AVERROR_INVALIDDATA; - - if(last_pos == pos || pos == base - 8) - avi->non_interleaved= 1; - if(last_pos != pos && (len || !ast->sample_size)) - av_add_index_entry(st, pos, ast->cum_len, len, 0, key ? AVINDEX_KEYFRAME : 0); - - ast->cum_len += get_duration(ast, len); - last_pos= pos; - }else{ - int64_t offset, pos; - int duration; - offset = avio_rl64(pb); - avio_rl32(pb); /* size */ - duration = avio_rl32(pb); - - if(url_feof(pb)) - return AVERROR_INVALIDDATA; - - pos = avio_tell(pb); - - if(avi->odml_depth > MAX_ODML_DEPTH){ - av_log(s, AV_LOG_ERROR, "Too deeply nested ODML indexes\n"); - return AVERROR_INVALIDDATA; - } - - if(avio_seek(pb, offset+8, SEEK_SET) < 0) - return -1; - avi->odml_depth++; - read_braindead_odml_indx(s, frame_num); - avi->odml_depth--; - frame_num += duration; - - if(avio_seek(pb, pos, SEEK_SET) < 0) { - av_log(s, AV_LOG_ERROR, "Failed to restore position after reading index\n"); - return -1; - } - - } - } - avi->index_loaded=2; - return 0; -} - -static void clean_index(AVFormatContext *s){ - int i; - int64_t j; - - for(i=0; i<s->nb_streams; i++){ - AVStream *st = s->streams[i]; - AVIStream *ast = st->priv_data; - int n= st->nb_index_entries; - int max= ast->sample_size; - int64_t pos, size, ts; - - if(n != 1 || ast->sample_size==0) - continue; - - while(max < 1024) max+=max; - - pos= st->index_entries[0].pos; - size= st->index_entries[0].size; - ts= st->index_entries[0].timestamp; - - for(j=0; j<size; j+=max){ - av_add_index_entry(st, pos+j, ts+j, FFMIN(max, size-j), 0, AVINDEX_KEYFRAME); - } - } -} - -static int avi_read_tag(AVFormatContext *s, AVStream *st, uint32_t tag, uint32_t size) -{ - AVIOContext *pb = s->pb; - char key[5] = {0}, *value; - - size += (size & 1); - - if (size == UINT_MAX) - return AVERROR(EINVAL); - value = av_malloc(size+1); - if (!value) - return AVERROR(ENOMEM); - avio_read(pb, value, size); - value[size]=0; - - AV_WL32(key, tag); - - return av_dict_set(st ? &st->metadata : &s->metadata, key, value, - AV_DICT_DONT_STRDUP_VAL); -} - -static const char months[12][4] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", - "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" }; - -static void avi_metadata_creation_time(AVDictionary **metadata, char *date) -{ - char month[4], time[9], buffer[64]; - int i, day, year; - /* parse standard AVI date format (ie. "Mon Mar 10 15:04:43 2003") */ - if (sscanf(date, "%*3s%*[ ]%3s%*[ ]%2d%*[ ]%8s%*[ ]%4d", - month, &day, time, &year) == 4) { - for (i=0; i<12; i++) - if (!av_strcasecmp(month, months[i])) { - snprintf(buffer, sizeof(buffer), "%.4d-%.2d-%.2d %s", - year, i+1, day, time); - av_dict_set(metadata, "creation_time", buffer, 0); - } - } else if (date[4] == '/' && date[7] == '/') { - date[4] = date[7] = '-'; - av_dict_set(metadata, "creation_time", date, 0); - } -} - -static void avi_read_nikon(AVFormatContext *s, uint64_t end) -{ - while (avio_tell(s->pb) < end) { - uint32_t tag = avio_rl32(s->pb); - uint32_t size = avio_rl32(s->pb); - switch (tag) { - case MKTAG('n', 'c', 't', 'g'): { /* Nikon Tags */ - uint64_t tag_end = avio_tell(s->pb) + size; - while (avio_tell(s->pb) < tag_end) { - uint16_t tag = avio_rl16(s->pb); - uint16_t size = avio_rl16(s->pb); - const char *name = NULL; - char buffer[64] = {0}; - size -= avio_read(s->pb, buffer, - FFMIN(size, sizeof(buffer)-1)); - switch (tag) { - case 0x03: name = "maker"; break; - case 0x04: name = "model"; break; - case 0x13: name = "creation_time"; - if (buffer[4] == ':' && buffer[7] == ':') - buffer[4] = buffer[7] = '-'; - break; - } - if (name) - av_dict_set(&s->metadata, name, buffer, 0); - avio_skip(s->pb, size); - } - break; - } - default: - avio_skip(s->pb, size); - break; - } - } -} - -static int avi_read_header(AVFormatContext *s) -{ - AVIContext *avi = s->priv_data; - AVIOContext *pb = s->pb; - unsigned int tag, tag1, handler; - int codec_type, stream_index, frame_period; - unsigned int size; - int i; - AVStream *st; - AVIStream *ast = NULL; - int avih_width=0, avih_height=0; - int amv_file_format=0; - uint64_t list_end = 0; - int ret; - - avi->stream_index= -1; - - ret = get_riff(s, pb); - if (ret < 0) - return ret; - - av_log(avi, AV_LOG_DEBUG, "use odml:%d\n", avi->use_odml); - - avi->io_fsize = avi->fsize = avio_size(pb); - if(avi->fsize<=0 || avi->fsize < avi->riff_end) - avi->fsize= avi->riff_end == 8 ? INT64_MAX : avi->riff_end; - - /* first list tag */ - stream_index = -1; - codec_type = -1; - frame_period = 0; - for(;;) { - if (url_feof(pb)) - goto fail; - tag = avio_rl32(pb); - size = avio_rl32(pb); - - print_tag("tag", tag, size); - - switch(tag) { - case MKTAG('L', 'I', 'S', 'T'): - list_end = avio_tell(pb) + size; - /* Ignored, except at start of video packets. */ - tag1 = avio_rl32(pb); - - print_tag("list", tag1, 0); - - if (tag1 == MKTAG('m', 'o', 'v', 'i')) { - avi->movi_list = avio_tell(pb) - 4; - if(size) avi->movi_end = avi->movi_list + size + (size & 1); - else avi->movi_end = avi->fsize; - av_dlog(NULL, "movi end=%"PRIx64"\n", avi->movi_end); - goto end_of_header; - } - else if (tag1 == MKTAG('I', 'N', 'F', 'O')) - ff_read_riff_info(s, size - 4); - else if (tag1 == MKTAG('n', 'c', 'd', 't')) - avi_read_nikon(s, list_end); - - break; - case MKTAG('I', 'D', 'I', 'T'): { - unsigned char date[64] = {0}; - size += (size & 1); - size -= avio_read(pb, date, FFMIN(size, sizeof(date)-1)); - avio_skip(pb, size); - avi_metadata_creation_time(&s->metadata, date); - break; - } - case MKTAG('d', 'm', 'l', 'h'): - avi->is_odml = 1; - avio_skip(pb, size + (size & 1)); - break; - case MKTAG('a', 'm', 'v', 'h'): - amv_file_format=1; - case MKTAG('a', 'v', 'i', 'h'): - /* AVI header */ - /* using frame_period is bad idea */ - frame_period = avio_rl32(pb); - avio_rl32(pb); /* max. bytes per second */ - avio_rl32(pb); - avi->non_interleaved |= avio_rl32(pb) & AVIF_MUSTUSEINDEX; - - avio_skip(pb, 2 * 4); - avio_rl32(pb); - avio_rl32(pb); - avih_width=avio_rl32(pb); - avih_height=avio_rl32(pb); - - avio_skip(pb, size - 10 * 4); - break; - case MKTAG('s', 't', 'r', 'h'): - /* stream header */ - - tag1 = avio_rl32(pb); - handler = avio_rl32(pb); /* codec tag */ - - if(tag1 == MKTAG('p', 'a', 'd', 's')){ - avio_skip(pb, size - 8); - break; - }else{ - stream_index++; - st = avformat_new_stream(s, NULL); - if (!st) - goto fail; - - st->id = stream_index; - ast = av_mallocz(sizeof(AVIStream)); - if (!ast) - goto fail; - st->priv_data = ast; - } - if(amv_file_format) - tag1 = stream_index ? MKTAG('a','u','d','s') : MKTAG('v','i','d','s'); - - print_tag("strh", tag1, -1); - - if(tag1 == MKTAG('i', 'a', 'v', 's') || tag1 == MKTAG('i', 'v', 'a', 's')){ - int64_t dv_dur; - - /* - * After some consideration -- I don't think we - * have to support anything but DV in type1 AVIs. - */ - if (s->nb_streams != 1) - goto fail; - - if (handler != MKTAG('d', 'v', 's', 'd') && - handler != MKTAG('d', 'v', 'h', 'd') && - handler != MKTAG('d', 'v', 's', 'l')) - goto fail; - - ast = s->streams[0]->priv_data; - av_freep(&s->streams[0]->codec->extradata); - av_freep(&s->streams[0]->codec); - if (s->streams[0]->info) - av_freep(&s->streams[0]->info->duration_error); - av_freep(&s->streams[0]->info); - av_freep(&s->streams[0]); - s->nb_streams = 0; - if (CONFIG_DV_DEMUXER) { - avi->dv_demux = avpriv_dv_init_demux(s); - if (!avi->dv_demux) - goto fail; - } - s->streams[0]->priv_data = ast; - avio_skip(pb, 3 * 4); - ast->scale = avio_rl32(pb); - ast->rate = avio_rl32(pb); - avio_skip(pb, 4); /* start time */ - - dv_dur = avio_rl32(pb); - if (ast->scale > 0 && ast->rate > 0 && dv_dur > 0) { - dv_dur *= AV_TIME_BASE; - s->duration = av_rescale(dv_dur, ast->scale, ast->rate); - } - /* - * else, leave duration alone; timing estimation in utils.c - * will make a guess based on bitrate. - */ - - stream_index = s->nb_streams - 1; - avio_skip(pb, size - 9*4); - break; - } - - av_assert0(stream_index < s->nb_streams); - st->codec->stream_codec_tag= handler; - - avio_rl32(pb); /* flags */ - avio_rl16(pb); /* priority */ - avio_rl16(pb); /* language */ - avio_rl32(pb); /* initial frame */ - ast->scale = avio_rl32(pb); - ast->rate = avio_rl32(pb); - if(!(ast->scale && ast->rate)){ - av_log(s, AV_LOG_WARNING, "scale/rate is %u/%u which is invalid. (This file has been generated by broken software.)\n", ast->scale, ast->rate); - if(frame_period){ - ast->rate = 1000000; - ast->scale = frame_period; - }else{ - ast->rate = 25; - ast->scale = 1; - } - } - avpriv_set_pts_info(st, 64, ast->scale, ast->rate); - - ast->cum_len=avio_rl32(pb); /* start */ - st->nb_frames = avio_rl32(pb); - - st->start_time = 0; - avio_rl32(pb); /* buffer size */ - avio_rl32(pb); /* quality */ - if (ast->cum_len*ast->scale/ast->rate > 3600) { - av_log(s, AV_LOG_ERROR, "crazy start time, iam scared, giving up\n"); - return AVERROR_INVALIDDATA; - } - ast->sample_size = avio_rl32(pb); /* sample ssize */ - ast->cum_len *= FFMAX(1, ast->sample_size); - av_dlog(s, "%"PRIu32" %"PRIu32" %d\n", - ast->rate, ast->scale, ast->sample_size); - - switch(tag1) { - case MKTAG('v', 'i', 'd', 's'): - codec_type = AVMEDIA_TYPE_VIDEO; - - ast->sample_size = 0; - break; - case MKTAG('a', 'u', 'd', 's'): - codec_type = AVMEDIA_TYPE_AUDIO; - break; - case MKTAG('t', 'x', 't', 's'): - codec_type = AVMEDIA_TYPE_SUBTITLE; - break; - case MKTAG('d', 'a', 't', 's'): - codec_type = AVMEDIA_TYPE_DATA; - break; - default: - av_log(s, AV_LOG_INFO, "unknown stream type %X\n", tag1); - } - if(ast->sample_size == 0) { - st->duration = st->nb_frames; - if (st->duration > 0 && avi->io_fsize > 0 && avi->riff_end > avi->io_fsize) { - av_log(s, AV_LOG_DEBUG, "File is truncated adjusting duration\n"); - st->duration = av_rescale(st->duration, avi->io_fsize, avi->riff_end); - } - } - ast->frame_offset= ast->cum_len; - avio_skip(pb, size - 12 * 4); - break; - case MKTAG('s', 't', 'r', 'f'): - /* stream header */ - if (!size) - break; - if (stream_index >= (unsigned)s->nb_streams || avi->dv_demux) { - avio_skip(pb, size); - } else { - uint64_t cur_pos = avio_tell(pb); - unsigned esize; - if (cur_pos < list_end) - size = FFMIN(size, list_end - cur_pos); - st = s->streams[stream_index]; - switch(codec_type) { - case AVMEDIA_TYPE_VIDEO: - if(amv_file_format){ - st->codec->width=avih_width; - st->codec->height=avih_height; - st->codec->codec_type = AVMEDIA_TYPE_VIDEO; - st->codec->codec_id = AV_CODEC_ID_AMV; - avio_skip(pb, size); - break; - } - tag1 = ff_get_bmp_header(pb, st, &esize); - - if (tag1 == MKTAG('D', 'X', 'S', 'B') || tag1 == MKTAG('D','X','S','A')) { - st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; - st->codec->codec_tag = tag1; - st->codec->codec_id = AV_CODEC_ID_XSUB; - break; - } - - if(size > 10*4 && size<(1<<30) && size < avi->fsize){ - if(esize == size-1 && (esize&1)) st->codec->extradata_size= esize - 10*4; - else st->codec->extradata_size= size - 10*4; - st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); - if (!st->codec->extradata) { - st->codec->extradata_size= 0; - return AVERROR(ENOMEM); - } - avio_read(pb, st->codec->extradata, st->codec->extradata_size); - } - - if(st->codec->extradata_size & 1) //FIXME check if the encoder really did this correctly - avio_r8(pb); - - /* Extract palette from extradata if bpp <= 8. */ - /* This code assumes that extradata contains only palette. */ - /* This is true for all paletted codecs implemented in FFmpeg. */ - if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) { - int pal_size = (1 << st->codec->bits_per_coded_sample) << 2; - const uint8_t *pal_src; - - pal_size = FFMIN(pal_size, st->codec->extradata_size); - pal_src = st->codec->extradata + st->codec->extradata_size - pal_size; - for (i = 0; i < pal_size/4; i++) - ast->pal[i] = 0xFFU<<24 | AV_RL32(pal_src+4*i); - ast->has_pal = 1; - } - - print_tag("video", tag1, 0); - - st->codec->codec_type = AVMEDIA_TYPE_VIDEO; - st->codec->codec_tag = tag1; - st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1); - st->need_parsing = AVSTREAM_PARSE_HEADERS; // This is needed to get the pict type which is necessary for generating correct pts. - - if(st->codec->codec_tag==0 && st->codec->height > 0 && st->codec->extradata_size < 1U<<30){ - st->codec->extradata_size+= 9; - st->codec->extradata= av_realloc_f(st->codec->extradata, 1, st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); - if(st->codec->extradata) - memcpy(st->codec->extradata + st->codec->extradata_size - 9, "BottomUp", 9); - } - st->codec->height= FFABS(st->codec->height); - -// avio_skip(pb, size - 5 * 4); - break; - case AVMEDIA_TYPE_AUDIO: - ret = ff_get_wav_header(pb, st->codec, size); - if (ret < 0) - return ret; - ast->dshow_block_align= st->codec->block_align; - if(ast->sample_size && st->codec->block_align && ast->sample_size != st->codec->block_align){ - av_log(s, AV_LOG_WARNING, "sample size (%d) != block align (%d)\n", ast->sample_size, st->codec->block_align); - ast->sample_size= st->codec->block_align; - } - if (size&1) /* 2-aligned (fix for Stargate SG-1 - 3x18 - Shades of Grey.avi) */ - avio_skip(pb, 1); - /* Force parsing as several audio frames can be in - * one packet and timestamps refer to packet start. */ - st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS; - /* ADTS header is in extradata, AAC without header must be - * stored as exact frames. Parser not needed and it will - * fail. */ - if (st->codec->codec_id == AV_CODEC_ID_AAC && st->codec->extradata_size) - st->need_parsing = AVSTREAM_PARSE_NONE; - /* AVI files with Xan DPCM audio (wrongly) declare PCM - * audio in the header but have Axan as stream_code_tag. */ - if (st->codec->stream_codec_tag == AV_RL32("Axan")){ - st->codec->codec_id = AV_CODEC_ID_XAN_DPCM; - st->codec->codec_tag = 0; - ast->dshow_block_align = 0; - } - if (amv_file_format){ - st->codec->codec_id = AV_CODEC_ID_ADPCM_IMA_AMV; - ast->dshow_block_align = 0; - } - if(st->codec->codec_id == AV_CODEC_ID_AAC && ast->dshow_block_align <= 4 && ast->dshow_block_align) { - av_log(s, AV_LOG_DEBUG, "overriding invalid dshow_block_align of %d\n", ast->dshow_block_align); - ast->dshow_block_align = 0; - } - if(st->codec->codec_id == AV_CODEC_ID_AAC && ast->dshow_block_align == 1024 && ast->sample_size == 1024 || - st->codec->codec_id == AV_CODEC_ID_AAC && ast->dshow_block_align == 4096 && ast->sample_size == 4096 || - st->codec->codec_id == AV_CODEC_ID_MP3 && ast->dshow_block_align == 1152 && ast->sample_size == 1152) { - av_log(s, AV_LOG_DEBUG, "overriding sample_size\n"); - ast->sample_size = 0; - } - break; - case AVMEDIA_TYPE_SUBTITLE: - st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; - st->request_probe= 1; - avio_skip(pb, size); - break; - default: - st->codec->codec_type = AVMEDIA_TYPE_DATA; - st->codec->codec_id= AV_CODEC_ID_NONE; - st->codec->codec_tag= 0; - avio_skip(pb, size); - break; - } - } - break; - case MKTAG('s', 't', 'r', 'd'): - if (stream_index >= (unsigned)s->nb_streams || s->streams[stream_index]->codec->extradata_size) { - avio_skip(pb, size); - } else { - uint64_t cur_pos = avio_tell(pb); - if (cur_pos < list_end) - size = FFMIN(size, list_end - cur_pos); - st = s->streams[stream_index]; - - if(size<(1<<30)){ - st->codec->extradata_size= size; - st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); - if (!st->codec->extradata) { - st->codec->extradata_size= 0; - return AVERROR(ENOMEM); - } - avio_read(pb, st->codec->extradata, st->codec->extradata_size); - } - - if(st->codec->extradata_size & 1) //FIXME check if the encoder really did this correctly - avio_r8(pb); - } - break; - case MKTAG('i', 'n', 'd', 'x'): - i= avio_tell(pb); - if(pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) && avi->use_odml && - read_braindead_odml_indx(s, 0) < 0 && (s->error_recognition & AV_EF_EXPLODE)) - goto fail; - avio_seek(pb, i+size, SEEK_SET); - break; - case MKTAG('v', 'p', 'r', 'p'): - if(stream_index < (unsigned)s->nb_streams && size > 9*4){ - AVRational active, active_aspect; - - st = s->streams[stream_index]; - avio_rl32(pb); - avio_rl32(pb); - avio_rl32(pb); - avio_rl32(pb); - avio_rl32(pb); - - active_aspect.den= avio_rl16(pb); - active_aspect.num= avio_rl16(pb); - active.num = avio_rl32(pb); - active.den = avio_rl32(pb); - avio_rl32(pb); //nbFieldsPerFrame - - if(active_aspect.num && active_aspect.den && active.num && active.den){ - st->sample_aspect_ratio= av_div_q(active_aspect, active); - av_dlog(s, "vprp %d/%d %d/%d\n", - active_aspect.num, active_aspect.den, - active.num, active.den); - } - size -= 9*4; - } - avio_skip(pb, size); - break; - case MKTAG('s', 't', 'r', 'n'): - if(s->nb_streams){ - ret = avi_read_tag(s, s->streams[s->nb_streams-1], tag, size); - if (ret < 0) - return ret; - break; - } - default: - if(size > 1000000){ - av_log(s, AV_LOG_ERROR, "Something went wrong during header parsing, " - "I will ignore it and try to continue anyway.\n"); - if (s->error_recognition & AV_EF_EXPLODE) - goto fail; - avi->movi_list = avio_tell(pb) - 4; - avi->movi_end = avi->fsize; - goto end_of_header; - } - /* skip tag */ - size += (size & 1); - avio_skip(pb, size); - break; - } - } - end_of_header: - /* check stream number */ - if (stream_index != s->nb_streams - 1) { - fail: - return AVERROR_INVALIDDATA; - } - - if(!avi->index_loaded && pb->seekable) - avi_load_index(s); - avi->index_loaded |= 1; - avi->non_interleaved |= guess_ni_flag(s) | (s->flags & AVFMT_FLAG_SORT_DTS); - for(i=0; i<s->nb_streams; i++){ - AVStream *st = s->streams[i]; - if(st->nb_index_entries) - break; - } - // DV-in-AVI cannot be non-interleaved, if set this must be - // a mis-detection. - if(avi->dv_demux) - avi->non_interleaved=0; - if(i==s->nb_streams && avi->non_interleaved) { - av_log(s, AV_LOG_WARNING, "non-interleaved AVI without index, switching to interleaved\n"); - avi->non_interleaved=0; - } - - if(avi->non_interleaved) { - av_log(s, AV_LOG_INFO, "non-interleaved AVI\n"); - clean_index(s); - } - - ff_metadata_conv_ctx(s, NULL, avi_metadata_conv); - ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv); - - return 0; -} - -static int read_gab2_sub(AVStream *st, AVPacket *pkt) { - if (pkt->data && !strcmp(pkt->data, "GAB2") && AV_RL16(pkt->data+5) == 2) { - uint8_t desc[256]; - int score = AVPROBE_SCORE_MAX / 2, ret; - AVIStream *ast = st->priv_data; - AVInputFormat *sub_demuxer; - AVRational time_base; - AVIOContext *pb = avio_alloc_context( pkt->data + 7, - pkt->size - 7, - 0, NULL, NULL, NULL, NULL); - AVProbeData pd; - unsigned int desc_len = avio_rl32(pb); - - if (desc_len > pb->buf_end - pb->buf_ptr) - goto error; - - ret = avio_get_str16le(pb, desc_len, desc, sizeof(desc)); - avio_skip(pb, desc_len - ret); - if (*desc) - av_dict_set(&st->metadata, "title", desc, 0); - - avio_rl16(pb); /* flags? */ - avio_rl32(pb); /* data size */ - - pd = (AVProbeData) { .buf = pb->buf_ptr, .buf_size = pb->buf_end - pb->buf_ptr }; - if (!(sub_demuxer = av_probe_input_format2(&pd, 1, &score))) - goto error; - - if (!(ast->sub_ctx = avformat_alloc_context())) - goto error; - - ast->sub_ctx->pb = pb; - if (!avformat_open_input(&ast->sub_ctx, "", sub_demuxer, NULL)) { - ff_read_packet(ast->sub_ctx, &ast->sub_pkt); - *st->codec = *ast->sub_ctx->streams[0]->codec; - ast->sub_ctx->streams[0]->codec->extradata = NULL; - time_base = ast->sub_ctx->streams[0]->time_base; - avpriv_set_pts_info(st, 64, time_base.num, time_base.den); - } - ast->sub_buffer = pkt->data; - memset(pkt, 0, sizeof(*pkt)); - return 1; -error: - av_freep(&pb); - } - return 0; -} - -static AVStream *get_subtitle_pkt(AVFormatContext *s, AVStream *next_st, - AVPacket *pkt) -{ - AVIStream *ast, *next_ast = next_st->priv_data; - int64_t ts, next_ts, ts_min = INT64_MAX; - AVStream *st, *sub_st = NULL; - int i; - - next_ts = av_rescale_q(next_ast->frame_offset, next_st->time_base, - AV_TIME_BASE_Q); - - for (i=0; i<s->nb_streams; i++) { - st = s->streams[i]; - ast = st->priv_data; - if (st->discard < AVDISCARD_ALL && ast && ast->sub_pkt.data) { - ts = av_rescale_q(ast->sub_pkt.dts, st->time_base, AV_TIME_BASE_Q); - if (ts <= next_ts && ts < ts_min) { - ts_min = ts; - sub_st = st; - } - } - } - - if (sub_st) { - ast = sub_st->priv_data; - *pkt = ast->sub_pkt; - pkt->stream_index = sub_st->index; - if (ff_read_packet(ast->sub_ctx, &ast->sub_pkt) < 0) - ast->sub_pkt.data = NULL; - } - return sub_st; -} - -static int get_stream_idx(int *d){ - if( d[0] >= '0' && d[0] <= '9' - && d[1] >= '0' && d[1] <= '9'){ - return (d[0] - '0') * 10 + (d[1] - '0'); - }else{ - return 100; //invalid stream ID - } -} - -/** - * - * @param exit_early set to 1 to just gather packet position without making the changes needed to actually read & return the packet - */ -static int avi_sync(AVFormatContext *s, int exit_early) -{ - AVIContext *avi = s->priv_data; - AVIOContext *pb = s->pb; - int n; - unsigned int d[8]; - unsigned int size; - int64_t i, sync; - -start_sync: - memset(d, -1, sizeof(d)); - for(i=sync=avio_tell(pb); !url_feof(pb); i++) { - int j; - - for(j=0; j<7; j++) - d[j]= d[j+1]; - d[7]= avio_r8(pb); - - size= d[4] + (d[5]<<8) + (d[6]<<16) + (d[7]<<24); - - n= get_stream_idx(d+2); - av_dlog(s, "%X %X %X %X %X %X %X %X %"PRId64" %u %d\n", - d[0], d[1], d[2], d[3], d[4], d[5], d[6], d[7], i, size, n); - if(i + (uint64_t)size > avi->fsize || d[0] > 127) - continue; - - //parse ix## - if( (d[0] == 'i' && d[1] == 'x' && n < s->nb_streams) - //parse JUNK - ||(d[0] == 'J' && d[1] == 'U' && d[2] == 'N' && d[3] == 'K') - ||(d[0] == 'i' && d[1] == 'd' && d[2] == 'x' && d[3] == '1')){ - avio_skip(pb, size); - goto start_sync; - } - - //parse stray LIST - if(d[0] == 'L' && d[1] == 'I' && d[2] == 'S' && d[3] == 'T'){ - avio_skip(pb, 4); - goto start_sync; - } - - n= get_stream_idx(d); - - if(!((i-avi->last_pkt_pos)&1) && get_stream_idx(d+1) < s->nb_streams) - continue; - - //detect ##ix chunk and skip - if(d[2] == 'i' && d[3] == 'x' && n < s->nb_streams){ - avio_skip(pb, size); - goto start_sync; - } - - //parse ##dc/##wb - if(n < s->nb_streams){ - AVStream *st; - AVIStream *ast; - st = s->streams[n]; - ast = st->priv_data; - - if (!ast) { - av_log(s, AV_LOG_WARNING, "Skiping foreign stream %d packet\n", n); - continue; - } - - if(s->nb_streams>=2){ - AVStream *st1 = s->streams[1]; - AVIStream *ast1= st1->priv_data; - //workaround for broken small-file-bug402.avi - if( d[2] == 'w' && d[3] == 'b' - && n==0 - && st ->codec->codec_type == AVMEDIA_TYPE_VIDEO - && st1->codec->codec_type == AVMEDIA_TYPE_AUDIO - && ast->prefix == 'd'*256+'c' - && (d[2]*256+d[3] == ast1->prefix || !ast1->prefix_count) - ){ - n=1; - st = st1; - ast = ast1; - av_log(s, AV_LOG_WARNING, "Invalid stream + prefix combination, assuming audio.\n"); - } - } - - - if( (st->discard >= AVDISCARD_DEFAULT && size==0) - /*|| (st->discard >= AVDISCARD_NONKEY && !(pkt->flags & AV_PKT_FLAG_KEY))*/ //FIXME needs a little reordering - || st->discard >= AVDISCARD_ALL){ - if (!exit_early) { - ast->frame_offset += get_duration(ast, size); - } - avio_skip(pb, size); - goto start_sync; - } - - if (d[2] == 'p' && d[3] == 'c' && size<=4*256+4) { - int k = avio_r8(pb); - int last = (k + avio_r8(pb) - 1) & 0xFF; - - avio_rl16(pb); //flags - - for (; k <= last; k++) - ast->pal[k] = 0xFFU<<24 | avio_rb32(pb)>>8;// b + (g << 8) + (r << 16); - ast->has_pal= 1; - goto start_sync; - } else if( ((ast->prefix_count<5 || sync+9 > i) && d[2]<128 && d[3]<128) || - d[2]*256+d[3] == ast->prefix /*|| - (d[2] == 'd' && d[3] == 'c') || - (d[2] == 'w' && d[3] == 'b')*/) { - - if (exit_early) - return 0; - if(d[2]*256+d[3] == ast->prefix) - ast->prefix_count++; - else{ - ast->prefix= d[2]*256+d[3]; - ast->prefix_count= 0; - } - - avi->stream_index= n; - ast->packet_size= size + 8; - ast->remaining= size; - - if(size || !ast->sample_size){ - uint64_t pos= avio_tell(pb) - 8; - if(!st->index_entries || !st->nb_index_entries || st->index_entries[st->nb_index_entries - 1].pos < pos){ - av_add_index_entry(st, pos, ast->frame_offset, size, 0, AVINDEX_KEYFRAME); - } - } - return 0; - } - } - } - - if(pb->error) - return pb->error; - return AVERROR_EOF; -} - -static int avi_read_packet(AVFormatContext *s, AVPacket *pkt) -{ - AVIContext *avi = s->priv_data; - AVIOContext *pb = s->pb; - int err; -#if FF_API_DESTRUCT_PACKET - void* dstr; -#endif - - if (CONFIG_DV_DEMUXER && avi->dv_demux) { - int size = avpriv_dv_get_packet(avi->dv_demux, pkt); - if (size >= 0) - return size; - } - - if(avi->non_interleaved){ - int best_stream_index = 0; - AVStream *best_st= NULL; - AVIStream *best_ast; - int64_t best_ts= INT64_MAX; - int i; - - for(i=0; i<s->nb_streams; i++){ - AVStream *st = s->streams[i]; - AVIStream *ast = st->priv_data; - int64_t ts= ast->frame_offset; - int64_t last_ts; - - if(!st->nb_index_entries) - continue; - - last_ts = st->index_entries[st->nb_index_entries - 1].timestamp; - if(!ast->remaining && ts > last_ts) - continue; - - ts = av_rescale_q(ts, st->time_base, (AVRational){FFMAX(1, ast->sample_size), AV_TIME_BASE}); - - av_dlog(s, "%"PRId64" %d/%d %"PRId64"\n", ts, - st->time_base.num, st->time_base.den, ast->frame_offset); - if(ts < best_ts){ - best_ts= ts; - best_st= st; - best_stream_index= i; - } - } - if(!best_st) - return AVERROR_EOF; - - best_ast = best_st->priv_data; - best_ts = best_ast->frame_offset; - if(best_ast->remaining) - i= av_index_search_timestamp(best_st, best_ts, AVSEEK_FLAG_ANY | AVSEEK_FLAG_BACKWARD); - else{ - i= av_index_search_timestamp(best_st, best_ts, AVSEEK_FLAG_ANY); - if(i>=0) - best_ast->frame_offset= best_st->index_entries[i].timestamp; - } - - if(i>=0){ - int64_t pos= best_st->index_entries[i].pos; - pos += best_ast->packet_size - best_ast->remaining; - if(avio_seek(s->pb, pos + 8, SEEK_SET) < 0) - return AVERROR_EOF; - - av_assert0(best_ast->remaining <= best_ast->packet_size); - - avi->stream_index= best_stream_index; - if(!best_ast->remaining) - best_ast->packet_size= - best_ast->remaining= best_st->index_entries[i].size; - } - else - return AVERROR_EOF; - } - -resync: - if(avi->stream_index >= 0){ - AVStream *st= s->streams[ avi->stream_index ]; - AVIStream *ast= st->priv_data; - int size, err; - - if(get_subtitle_pkt(s, st, pkt)) - return 0; - - if(ast->sample_size <= 1) // minorityreport.AVI block_align=1024 sample_size=1 IMA-ADPCM - size= INT_MAX; - else if(ast->sample_size < 32) - // arbitrary multiplier to avoid tiny packets for raw PCM data - size= 1024*ast->sample_size; - else - size= ast->sample_size; - - if(size > ast->remaining) - size= ast->remaining; - avi->last_pkt_pos= avio_tell(pb); - err= av_get_packet(pb, pkt, size); - if(err<0) - return err; - size = err; - - if(ast->has_pal && pkt->size<(unsigned)INT_MAX/2){ - uint8_t *pal; - pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE); - if(!pal){ - av_log(s, AV_LOG_ERROR, "Failed to allocate data for palette\n"); - }else{ - memcpy(pal, ast->pal, AVPALETTE_SIZE); - ast->has_pal = 0; - } - } - - if (CONFIG_DV_DEMUXER && avi->dv_demux) { - AVBufferRef *avbuf = pkt->buf; -#if FF_API_DESTRUCT_PACKET - dstr = pkt->destruct; -#endif - size = avpriv_dv_produce_packet(avi->dv_demux, pkt, - pkt->data, pkt->size, pkt->pos); -#if FF_API_DESTRUCT_PACKET - pkt->destruct = dstr; -#endif - pkt->buf = avbuf; - pkt->flags |= AV_PKT_FLAG_KEY; - if (size < 0) - av_free_packet(pkt); - } else if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE - && !st->codec->codec_tag && read_gab2_sub(st, pkt)) { - ast->frame_offset++; - avi->stream_index = -1; - ast->remaining = 0; - goto resync; - } else { - /* XXX: How to handle B-frames in AVI? */ - pkt->dts = ast->frame_offset; -// pkt->dts += ast->start; - if(ast->sample_size) - pkt->dts /= ast->sample_size; - av_dlog(s, "dts:%"PRId64" offset:%"PRId64" %d/%d smpl_siz:%d base:%d st:%d size:%d\n", - pkt->dts, ast->frame_offset, ast->scale, ast->rate, - ast->sample_size, AV_TIME_BASE, avi->stream_index, size); - pkt->stream_index = avi->stream_index; - - if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { - AVIndexEntry *e; - int index; - av_assert0(st->index_entries); - - index= av_index_search_timestamp(st, ast->frame_offset, 0); - e= &st->index_entries[index]; - - if(index >= 0 && e->timestamp == ast->frame_offset){ - if (index == st->nb_index_entries-1){ - int key=1; - int i; - uint32_t state=-1; - for(i=0; i<FFMIN(size,256); i++){ - if(st->codec->codec_id == AV_CODEC_ID_MPEG4){ - if(state == 0x1B6){ - key= !(pkt->data[i]&0xC0); - break; - } - }else - break; - state= (state<<8) + pkt->data[i]; - } - if(!key) - e->flags &= ~AVINDEX_KEYFRAME; - } - if (e->flags & AVINDEX_KEYFRAME) - pkt->flags |= AV_PKT_FLAG_KEY; - } - } else { - pkt->flags |= AV_PKT_FLAG_KEY; - } - ast->frame_offset += get_duration(ast, pkt->size); - } - ast->remaining -= err; - if(!ast->remaining){ - avi->stream_index= -1; - ast->packet_size= 0; - } - - if(!avi->non_interleaved && pkt->pos >= 0 && ast->seek_pos > pkt->pos){ - av_free_packet(pkt); - goto resync; - } - ast->seek_pos= 0; - - if(!avi->non_interleaved && st->nb_index_entries>1 && avi->index_loaded>1){ - int64_t dts= av_rescale_q(pkt->dts, st->time_base, AV_TIME_BASE_Q); - - if(avi->dts_max - dts > 2*AV_TIME_BASE){ - avi->non_interleaved= 1; - av_log(s, AV_LOG_INFO, "Switching to NI mode, due to poor interleaving\n"); - }else if(avi->dts_max < dts) - avi->dts_max = dts; - } - - return 0; - } - - if ((err = avi_sync(s, 0)) < 0) - return err; - goto resync; -} - -/* XXX: We make the implicit supposition that the positions are sorted - for each stream. */ -static int avi_read_idx1(AVFormatContext *s, int size) -{ - AVIContext *avi = s->priv_data; - AVIOContext *pb = s->pb; - int nb_index_entries, i; - AVStream *st; - AVIStream *ast; - unsigned int index, tag, flags, pos, len, first_packet = 1; - unsigned last_pos= -1; - unsigned last_idx= -1; - int64_t idx1_pos, first_packet_pos = 0, data_offset = 0; - int anykey = 0; - - nb_index_entries = size / 16; - if (nb_index_entries <= 0) - return AVERROR_INVALIDDATA; - - idx1_pos = avio_tell(pb); - avio_seek(pb, avi->movi_list+4, SEEK_SET); - if (avi_sync(s, 1) == 0) { - first_packet_pos = avio_tell(pb) - 8; - } - avi->stream_index = -1; - avio_seek(pb, idx1_pos, SEEK_SET); - - if (s->nb_streams == 1 && s->streams[0]->codec->codec_tag == AV_RL32("MMES")){ - first_packet_pos = 0; - data_offset = avi->movi_list; - } - - /* Read the entries and sort them in each stream component. */ - for(i = 0; i < nb_index_entries; i++) { - if(url_feof(pb)) - return -1; - - tag = avio_rl32(pb); - flags = avio_rl32(pb); - pos = avio_rl32(pb); - len = avio_rl32(pb); - av_dlog(s, "%d: tag=0x%x flags=0x%x pos=0x%x len=%d/", - i, tag, flags, pos, len); - - index = ((tag & 0xff) - '0') * 10; - index += ((tag >> 8) & 0xff) - '0'; - if (index >= s->nb_streams) - continue; - st = s->streams[index]; - ast = st->priv_data; - - if(first_packet && first_packet_pos && len) { - data_offset = first_packet_pos - pos; - first_packet = 0; - } - pos += data_offset; - - av_dlog(s, "%d cum_len=%"PRId64"\n", len, ast->cum_len); - - // even if we have only a single stream, we should - // switch to non-interleaved to get correct timestamps - if(last_pos == pos) - avi->non_interleaved= 1; - if(last_idx != pos && len) { - av_add_index_entry(st, pos, ast->cum_len, len, 0, (flags&AVIIF_INDEX) ? AVINDEX_KEYFRAME : 0); - last_idx= pos; - } - ast->cum_len += get_duration(ast, len); - last_pos= pos; - anykey |= flags&AVIIF_INDEX; - } - if (!anykey) { - for (index = 0; index < s->nb_streams; index++) { - st = s->streams[index]; - if (st->nb_index_entries) - st->index_entries[0].flags |= AVINDEX_KEYFRAME; - } - } - return 0; -} - -static int guess_ni_flag(AVFormatContext *s){ - int i; - int64_t last_start=0; - int64_t first_end= INT64_MAX; - int64_t oldpos= avio_tell(s->pb); - int *idx; - int64_t min_pos, pos; - - for(i=0; i<s->nb_streams; i++){ - AVStream *st = s->streams[i]; - int n= st->nb_index_entries; - unsigned int size; - - if(n <= 0) - continue; - - if(n >= 2){ - int64_t pos= st->index_entries[0].pos; - avio_seek(s->pb, pos + 4, SEEK_SET); - size= avio_rl32(s->pb); - if(pos + size > st->index_entries[1].pos) - last_start= INT64_MAX; - } - - if(st->index_entries[0].pos > last_start) - last_start= st->index_entries[0].pos; - if(st->index_entries[n-1].pos < first_end) - first_end= st->index_entries[n-1].pos; - } - avio_seek(s->pb, oldpos, SEEK_SET); - if (last_start > first_end) - return 1; - idx= av_mallocz(sizeof(*idx) * s->nb_streams); - for (min_pos=pos=0; min_pos!=INT64_MAX; pos= min_pos+1LU) { - int64_t max_dts = INT64_MIN/2, min_dts= INT64_MAX/2; - min_pos = INT64_MAX; - - for (i=0; i<s->nb_streams; i++) { - AVStream *st = s->streams[i]; - int n= st->nb_index_entries; - while (idx[i]<n && st->index_entries[idx[i]].pos < pos) - idx[i]++; - if (idx[i] < n) { - min_dts = FFMIN(min_dts, av_rescale_q(st->index_entries[idx[i]].timestamp, st->time_base, AV_TIME_BASE_Q)); - min_pos = FFMIN(min_pos, st->index_entries[idx[i]].pos); - } - if (idx[i]) - max_dts = FFMAX(max_dts, av_rescale_q(st->index_entries[idx[i]-1].timestamp, st->time_base, AV_TIME_BASE_Q)); - } - if(max_dts - min_dts > 2*AV_TIME_BASE) { - av_free(idx); - return 1; - } - } - av_free(idx); - return 0; -} - -static int avi_load_index(AVFormatContext *s) -{ - AVIContext *avi = s->priv_data; - AVIOContext *pb = s->pb; - uint32_t tag, size; - int64_t pos= avio_tell(pb); - int64_t next; - int ret = -1; - - if (avio_seek(pb, avi->movi_end, SEEK_SET) < 0) - goto the_end; // maybe truncated file - av_dlog(s, "movi_end=0x%"PRIx64"\n", avi->movi_end); - for(;;) { - tag = avio_rl32(pb); - size = avio_rl32(pb); - if (url_feof(pb)) - break; - next = avio_tell(pb) + size + (size & 1); - - av_dlog(s, "tag=%c%c%c%c size=0x%x\n", - tag & 0xff, - (tag >> 8) & 0xff, - (tag >> 16) & 0xff, - (tag >> 24) & 0xff, - size); - - if (tag == MKTAG('i', 'd', 'x', '1') && - avi_read_idx1(s, size) >= 0) { - avi->index_loaded=2; - ret = 0; - }else if(tag == MKTAG('L', 'I', 'S', 'T')) { - uint32_t tag1 = avio_rl32(pb); - - if (tag1 == MKTAG('I', 'N', 'F', 'O')) - ff_read_riff_info(s, size - 4); - }else if(!ret) - break; - - if (avio_seek(pb, next, SEEK_SET) < 0) - break; // something is wrong here - } - the_end: - avio_seek(pb, pos, SEEK_SET); - return ret; -} - -static void seek_subtitle(AVStream *st, AVStream *st2, int64_t timestamp) -{ - AVIStream *ast2 = st2->priv_data; - int64_t ts2 = av_rescale_q(timestamp, st->time_base, st2->time_base); - av_free_packet(&ast2->sub_pkt); - if (avformat_seek_file(ast2->sub_ctx, 0, INT64_MIN, ts2, ts2, 0) >= 0 || - avformat_seek_file(ast2->sub_ctx, 0, ts2, ts2, INT64_MAX, 0) >= 0) - ff_read_packet(ast2->sub_ctx, &ast2->sub_pkt); -} - -static int avi_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) -{ - AVIContext *avi = s->priv_data; - AVStream *st; - int i, index; - int64_t pos, pos_min; - AVIStream *ast; - - if (!avi->index_loaded) { - /* we only load the index on demand */ - avi_load_index(s); - avi->index_loaded |= 1; - } - av_assert0(stream_index>= 0); - - st = s->streams[stream_index]; - ast= st->priv_data; - index= av_index_search_timestamp(st, timestamp * FFMAX(ast->sample_size, 1), flags); - if (index<0) { - if (st->nb_index_entries > 0) - av_log(s, AV_LOG_DEBUG, "Failed to find timestamp %"PRId64 " in index %"PRId64 " .. %"PRId64 "\n", - timestamp * FFMAX(ast->sample_size, 1), - st->index_entries[0].timestamp, - st->index_entries[st->nb_index_entries - 1].timestamp); - return AVERROR_INVALIDDATA; - } - - /* find the position */ - pos = st->index_entries[index].pos; - timestamp = st->index_entries[index].timestamp / FFMAX(ast->sample_size, 1); - - av_dlog(s, "XX %"PRId64" %d %"PRId64"\n", - timestamp, index, st->index_entries[index].timestamp); - - if (CONFIG_DV_DEMUXER && avi->dv_demux) { - /* One and only one real stream for DV in AVI, and it has video */ - /* offsets. Calling with other stream indexes should have failed */ - /* the av_index_search_timestamp call above. */ - av_assert0(stream_index == 0); - - if(avio_seek(s->pb, pos, SEEK_SET) < 0) - return -1; - - /* Feed the DV video stream version of the timestamp to the */ - /* DV demux so it can synthesize correct timestamps. */ - ff_dv_offset_reset(avi->dv_demux, timestamp); - - avi->stream_index= -1; - return 0; - } - - pos_min= pos; - for(i = 0; i < s->nb_streams; i++) { - AVStream *st2 = s->streams[i]; - AVIStream *ast2 = st2->priv_data; - - ast2->packet_size= - ast2->remaining= 0; - - if (ast2->sub_ctx) { - seek_subtitle(st, st2, timestamp); - continue; - } - - if (st2->nb_index_entries <= 0) - continue; - -// av_assert1(st2->codec->block_align); - av_assert0((int64_t)st2->time_base.num*ast2->rate == (int64_t)st2->time_base.den*ast2->scale); - index = av_index_search_timestamp( - st2, - av_rescale_q(timestamp, st->time_base, st2->time_base) * FFMAX(ast2->sample_size, 1), - flags | AVSEEK_FLAG_BACKWARD | (st2->codec->codec_type != AVMEDIA_TYPE_VIDEO ? AVSEEK_FLAG_ANY : 0)); - if(index<0) - index=0; - ast2->seek_pos= st2->index_entries[index].pos; - pos_min= FFMIN(pos_min,ast2->seek_pos); - } - for(i = 0; i < s->nb_streams; i++) { - AVStream *st2 = s->streams[i]; - AVIStream *ast2 = st2->priv_data; - - if (ast2->sub_ctx || st2->nb_index_entries <= 0) - continue; - - index = av_index_search_timestamp( - st2, - av_rescale_q(timestamp, st->time_base, st2->time_base) * FFMAX(ast2->sample_size, 1), - flags | AVSEEK_FLAG_BACKWARD | (st2->codec->codec_type != AVMEDIA_TYPE_VIDEO ? AVSEEK_FLAG_ANY : 0)); - if(index<0) - index=0; - while(!avi->non_interleaved && index>0 && st2->index_entries[index-1].pos >= pos_min) - index--; - ast2->frame_offset = st2->index_entries[index].timestamp; - } - - /* do the seek */ - if (avio_seek(s->pb, pos_min, SEEK_SET) < 0) { - av_log(s, AV_LOG_ERROR, "Seek failed\n"); - return -1; - } - avi->stream_index= -1; - avi->dts_max= INT_MIN; - return 0; -} - -static int avi_read_close(AVFormatContext *s) -{ - int i; - AVIContext *avi = s->priv_data; - - for(i=0;i<s->nb_streams;i++) { - AVStream *st = s->streams[i]; - AVIStream *ast = st->priv_data; - if (ast) { - if (ast->sub_ctx) { - av_freep(&ast->sub_ctx->pb); - avformat_close_input(&ast->sub_ctx); - } - av_free(ast->sub_buffer); - av_free_packet(&ast->sub_pkt); - } - } - - av_free(avi->dv_demux); - - return 0; -} - -static int avi_probe(AVProbeData *p) -{ - int i; - - /* check file header */ - for(i=0; avi_headers[i][0]; i++) - if(!memcmp(p->buf , avi_headers[i] , 4) && - !memcmp(p->buf+8, avi_headers[i]+4, 4)) - return AVPROBE_SCORE_MAX; - - return 0; -} - -AVInputFormat ff_avi_demuxer = { - .name = "avi", - .long_name = NULL_IF_CONFIG_SMALL("AVI (Audio Video Interleaved)"), - .priv_data_size = sizeof(AVIContext), - .read_probe = avi_probe, - .read_header = avi_read_header, - .read_packet = avi_read_packet, - .read_close = avi_read_close, - .read_seek = avi_read_seek, - .priv_class = &demuxer_class, -}; |