diff options
| author | Tim Redfern <tim@eclectronics.org> | 2013-09-05 17:55:35 +0100 |
|---|---|---|
| committer | Tim Redfern <tim@eclectronics.org> | 2013-09-05 17:55:35 +0100 |
| commit | 741fb4b9e135cfb161a749db88713229038577bb (patch) | |
| tree | 08bc9925659cbcac45162bacf31dc6336d4f60b4 /ffmpeg1/libavformat/bethsoftvid.c | |
| parent | a2e1bf3495b7bfefdaedb8fc737e969ab06df079 (diff) | |
making act segmenter
Diffstat (limited to 'ffmpeg1/libavformat/bethsoftvid.c')
| -rw-r--r-- | ffmpeg1/libavformat/bethsoftvid.c | 296 |
1 files changed, 0 insertions, 296 deletions
diff --git a/ffmpeg1/libavformat/bethsoftvid.c b/ffmpeg1/libavformat/bethsoftvid.c deleted file mode 100644 index b8f08c1..0000000 --- a/ffmpeg1/libavformat/bethsoftvid.c +++ /dev/null @@ -1,296 +0,0 @@ -/* - * Bethsoft VID format Demuxer - * Copyright (c) 2007 Nicholas Tung - * - * 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 - */ - -/** - * @file - * @brief Bethesda Softworks VID (.vid) file demuxer - * @author Nicholas Tung [ntung (at. ntung com] (2007-03) - * @see http://wiki.multimedia.cx/index.php?title=Bethsoft_VID - * @see http://www.svatopluk.com/andux/docs/dfvid.html - */ - -#include "libavutil/channel_layout.h" -#include "libavutil/intreadwrite.h" -#include "avformat.h" -#include "internal.h" -#include "libavcodec/bethsoftvideo.h" - -#define BVID_PALETTE_SIZE 3 * 256 - -#define DEFAULT_SAMPLE_RATE 11111 - -typedef struct BVID_DemuxContext -{ - int nframes; - int sample_rate; /**< audio sample rate */ - int width; /**< video width */ - int height; /**< video height */ - /** delay value between frames, added to individual frame delay. - * custom units, which will be added to other custom units (~=16ms according - * to free, unofficial documentation) */ - int bethsoft_global_delay; - int video_index; /**< video stream index */ - int audio_index; /**< audio stream index */ - uint8_t *palette; - - int is_finished; - -} BVID_DemuxContext; - -static int vid_probe(AVProbeData *p) -{ - // little-endian VID tag, file starts with "VID\0" - if (AV_RL32(p->buf) != MKTAG('V', 'I', 'D', 0)) - return 0; - - return AVPROBE_SCORE_MAX; -} - -static int vid_read_header(AVFormatContext *s) -{ - BVID_DemuxContext *vid = s->priv_data; - AVIOContext *pb = s->pb; - - /* load main header. Contents: - * bytes: 'V' 'I' 'D' - * int16s: always_512, nframes, width, height, delay, always_14 - */ - avio_skip(pb, 5); - vid->nframes = avio_rl16(pb); - vid->width = avio_rl16(pb); - vid->height = avio_rl16(pb); - vid->bethsoft_global_delay = avio_rl16(pb); - avio_rl16(pb); - - // wait until the first packet to create each stream - vid->video_index = -1; - vid->audio_index = -1; - vid->sample_rate = DEFAULT_SAMPLE_RATE; - s->ctx_flags |= AVFMTCTX_NOHEADER; - - return 0; -} - -#define BUFFER_PADDING_SIZE 1000 -static int read_frame(BVID_DemuxContext *vid, AVIOContext *pb, AVPacket *pkt, - uint8_t block_type, AVFormatContext *s) -{ - uint8_t * vidbuf_start = NULL; - int vidbuf_nbytes = 0; - int code; - int bytes_copied = 0; - int position, duration, npixels; - unsigned int vidbuf_capacity; - int ret = 0; - AVStream *st; - - if (vid->video_index < 0) { - st = avformat_new_stream(s, NULL); - if (!st) - return AVERROR(ENOMEM); - vid->video_index = st->index; - if (vid->audio_index < 0) { - avpriv_request_sample(s, "Using default video time base since " - "having no audio packet before the first " - "video packet"); - } - avpriv_set_pts_info(st, 64, 185, vid->sample_rate); - st->codec->codec_type = AVMEDIA_TYPE_VIDEO; - st->codec->codec_id = AV_CODEC_ID_BETHSOFTVID; - st->codec->width = vid->width; - st->codec->height = vid->height; - } - st = s->streams[vid->video_index]; - npixels = st->codec->width * st->codec->height; - - vidbuf_start = av_malloc(vidbuf_capacity = BUFFER_PADDING_SIZE); - if(!vidbuf_start) - return AVERROR(ENOMEM); - - // save the file position for the packet, include block type - position = avio_tell(pb) - 1; - - vidbuf_start[vidbuf_nbytes++] = block_type; - - // get the current packet duration - duration = vid->bethsoft_global_delay + avio_rl16(pb); - - // set the y offset if it exists (decoder header data should be in data section) - if(block_type == VIDEO_YOFF_P_FRAME){ - if (avio_read(pb, &vidbuf_start[vidbuf_nbytes], 2) != 2) { - ret = AVERROR(EIO); - goto fail; - } - vidbuf_nbytes += 2; - } - - do{ - vidbuf_start = av_fast_realloc(vidbuf_start, &vidbuf_capacity, vidbuf_nbytes + BUFFER_PADDING_SIZE); - if(!vidbuf_start) - return AVERROR(ENOMEM); - - code = avio_r8(pb); - vidbuf_start[vidbuf_nbytes++] = code; - - if(code >= 0x80){ // rle sequence - if(block_type == VIDEO_I_FRAME) - vidbuf_start[vidbuf_nbytes++] = avio_r8(pb); - } else if(code){ // plain sequence - if (avio_read(pb, &vidbuf_start[vidbuf_nbytes], code) != code) { - ret = AVERROR(EIO); - goto fail; - } - vidbuf_nbytes += code; - } - bytes_copied += code & 0x7F; - if(bytes_copied == npixels){ // sometimes no stop character is given, need to keep track of bytes copied - // may contain a 0 byte even if read all pixels - if(avio_r8(pb)) - avio_seek(pb, -1, SEEK_CUR); - break; - } - if (bytes_copied > npixels) { - ret = AVERROR_INVALIDDATA; - goto fail; - } - } while(code); - - // copy data into packet - if ((ret = av_new_packet(pkt, vidbuf_nbytes)) < 0) - goto fail; - memcpy(pkt->data, vidbuf_start, vidbuf_nbytes); - av_free(vidbuf_start); - - pkt->pos = position; - pkt->stream_index = vid->video_index; - pkt->duration = duration; - if (block_type == VIDEO_I_FRAME) - pkt->flags |= AV_PKT_FLAG_KEY; - - /* if there is a new palette available, add it to packet side data */ - if (vid->palette) { - uint8_t *pdata = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, - BVID_PALETTE_SIZE); - if (pdata) - memcpy(pdata, vid->palette, BVID_PALETTE_SIZE); - av_freep(&vid->palette); - } - - vid->nframes--; // used to check if all the frames were read - return 0; -fail: - av_free(vidbuf_start); - return ret; -} - -static int vid_read_packet(AVFormatContext *s, - AVPacket *pkt) -{ - BVID_DemuxContext *vid = s->priv_data; - AVIOContext *pb = s->pb; - unsigned char block_type; - int audio_length; - int ret_value; - - if(vid->is_finished || url_feof(pb)) - return AVERROR_EOF; - - block_type = avio_r8(pb); - switch(block_type){ - case PALETTE_BLOCK: - if (vid->palette) { - av_log(s, AV_LOG_WARNING, "discarding unused palette\n"); - av_freep(&vid->palette); - } - vid->palette = av_malloc(BVID_PALETTE_SIZE); - if (!vid->palette) - return AVERROR(ENOMEM); - if (avio_read(pb, vid->palette, BVID_PALETTE_SIZE) != BVID_PALETTE_SIZE) { - av_freep(&vid->palette); - return AVERROR(EIO); - } - return vid_read_packet(s, pkt); - - case FIRST_AUDIO_BLOCK: - avio_rl16(pb); - // soundblaster DAC used for sample rate, as on specification page (link above) - vid->sample_rate = 1000000 / (256 - avio_r8(pb)); - case AUDIO_BLOCK: - if (vid->audio_index < 0) { - AVStream *st = avformat_new_stream(s, NULL); - if (!st) - return AVERROR(ENOMEM); - vid->audio_index = st->index; - st->codec->codec_type = AVMEDIA_TYPE_AUDIO; - st->codec->codec_id = AV_CODEC_ID_PCM_U8; - st->codec->channels = 1; - st->codec->channel_layout = AV_CH_LAYOUT_MONO; - st->codec->bits_per_coded_sample = 8; - st->codec->sample_rate = vid->sample_rate; - st->codec->bit_rate = 8 * st->codec->sample_rate; - st->start_time = 0; - avpriv_set_pts_info(st, 64, 1, vid->sample_rate); - } - audio_length = avio_rl16(pb); - if ((ret_value = av_get_packet(pb, pkt, audio_length)) != audio_length) { - if (ret_value < 0) - return ret_value; - av_log(s, AV_LOG_ERROR, "incomplete audio block\n"); - return AVERROR(EIO); - } - pkt->stream_index = vid->audio_index; - pkt->duration = audio_length; - pkt->flags |= AV_PKT_FLAG_KEY; - return 0; - - case VIDEO_P_FRAME: - case VIDEO_YOFF_P_FRAME: - case VIDEO_I_FRAME: - return read_frame(vid, pb, pkt, block_type, s); - - case EOF_BLOCK: - if(vid->nframes != 0) - av_log(s, AV_LOG_VERBOSE, "reached terminating character but not all frames read.\n"); - vid->is_finished = 1; - return AVERROR(EIO); - default: - av_log(s, AV_LOG_ERROR, "unknown block (character = %c, decimal = %d, hex = %x)!!!\n", - block_type, block_type, block_type); - return AVERROR_INVALIDDATA; - } -} - -static int vid_read_close(AVFormatContext *s) -{ - BVID_DemuxContext *vid = s->priv_data; - av_freep(&vid->palette); - return 0; -} - -AVInputFormat ff_bethsoftvid_demuxer = { - .name = "bethsoftvid", - .long_name = NULL_IF_CONFIG_SMALL("Bethesda Softworks VID"), - .priv_data_size = sizeof(BVID_DemuxContext), - .read_probe = vid_probe, - .read_header = vid_read_header, - .read_packet = vid_read_packet, - .read_close = vid_read_close, -}; 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