diff options
Diffstat (limited to 'ffmpeg/libavformat/rpl.c')
| -rw-r--r-- | ffmpeg/libavformat/rpl.c | 359 |
1 files changed, 0 insertions, 359 deletions
diff --git a/ffmpeg/libavformat/rpl.c b/ffmpeg/libavformat/rpl.c deleted file mode 100644 index fb60379..0000000 --- a/ffmpeg/libavformat/rpl.c +++ /dev/null @@ -1,359 +0,0 @@ -/* - * ARMovie/RPL demuxer - * Copyright (c) 2007 Christian Ohm, 2008 Eli Friedman - * - * 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 <stdint.h> -#include <stdlib.h> - -#include "libavutil/avstring.h" -#include "libavutil/dict.h" -#include "avformat.h" -#include "internal.h" - -#define RPL_SIGNATURE "ARMovie\x0A" -#define RPL_SIGNATURE_SIZE 8 - -/** 256 is arbitrary, but should be big enough for any reasonable file. */ -#define RPL_LINE_LENGTH 256 - -static int rpl_probe(AVProbeData *p) -{ - if (memcmp(p->buf, RPL_SIGNATURE, RPL_SIGNATURE_SIZE)) - return 0; - - return AVPROBE_SCORE_MAX; -} - -typedef struct RPLContext { - // RPL header data - int32_t frames_per_chunk; - - // Stream position data - uint32_t chunk_number; - uint32_t chunk_part; - uint32_t frame_in_part; -} RPLContext; - -static int read_line(AVIOContext * pb, char* line, int bufsize) -{ - int i; - for (i = 0; i < bufsize - 1; i++) { - int b = avio_r8(pb); - if (b == 0) - break; - if (b == '\n') { - line[i] = '\0'; - return url_feof(pb) ? -1 : 0; - } - line[i] = b; - } - line[i] = '\0'; - return -1; -} - -static int32_t read_int(const char* line, const char** endptr, int* error) -{ - unsigned long result = 0; - for (; *line>='0' && *line<='9'; line++) { - if (result > (0x7FFFFFFF - 9) / 10) - *error = -1; - result = 10 * result + *line - '0'; - } - *endptr = line; - return result; -} - -static int32_t read_line_and_int(AVIOContext * pb, int* error) -{ - char line[RPL_LINE_LENGTH]; - const char *endptr; - *error |= read_line(pb, line, sizeof(line)); - return read_int(line, &endptr, error); -} - -/** Parsing for fps, which can be a fraction. Unfortunately, - * the spec for the header leaves out a lot of details, - * so this is mostly guessing. - */ -static AVRational read_fps(const char* line, int* error) -{ - int64_t num, den = 1; - AVRational result; - num = read_int(line, &line, error); - if (*line == '.') - line++; - for (; *line>='0' && *line<='9'; line++) { - // Truncate any numerator too large to fit into an int64_t - if (num > (INT64_MAX - 9) / 10 || den > INT64_MAX / 10) - break; - num = 10 * num + *line - '0'; - den *= 10; - } - if (!num) - *error = -1; - av_reduce(&result.num, &result.den, num, den, 0x7FFFFFFF); - return result; -} - -static int rpl_read_header(AVFormatContext *s) -{ - AVIOContext *pb = s->pb; - RPLContext *rpl = s->priv_data; - AVStream *vst = NULL, *ast = NULL; - int total_audio_size; - int error = 0; - - uint32_t i; - - int32_t audio_format, chunk_catalog_offset, number_of_chunks; - AVRational fps; - - char line[RPL_LINE_LENGTH]; - - // The header for RPL/ARMovie files is 21 lines of text - // containing the various header fields. The fields are always - // in the same order, and other text besides the first - // number usually isn't important. - // (The spec says that there exists some significance - // for the text in a few cases; samples needed.) - error |= read_line(pb, line, sizeof(line)); // ARMovie - error |= read_line(pb, line, sizeof(line)); // movie name - av_dict_set(&s->metadata, "title" , line, 0); - error |= read_line(pb, line, sizeof(line)); // date/copyright - av_dict_set(&s->metadata, "copyright", line, 0); - error |= read_line(pb, line, sizeof(line)); // author and other - av_dict_set(&s->metadata, "author" , line, 0); - - // video headers - vst = avformat_new_stream(s, NULL); - if (!vst) - return AVERROR(ENOMEM); - vst->codec->codec_type = AVMEDIA_TYPE_VIDEO; - vst->codec->codec_tag = read_line_and_int(pb, &error); // video format - vst->codec->width = read_line_and_int(pb, &error); // video width - vst->codec->height = read_line_and_int(pb, &error); // video height - vst->codec->bits_per_coded_sample = read_line_and_int(pb, &error); // video bits per sample - error |= read_line(pb, line, sizeof(line)); // video frames per second - fps = read_fps(line, &error); - avpriv_set_pts_info(vst, 32, fps.den, fps.num); - - // Figure out the video codec - switch (vst->codec->codec_tag) { -#if 0 - case 122: - vst->codec->codec_id = AV_CODEC_ID_ESCAPE122; - break; -#endif - case 124: - vst->codec->codec_id = AV_CODEC_ID_ESCAPE124; - // The header is wrong here, at least sometimes - vst->codec->bits_per_coded_sample = 16; - break; - case 130: - vst->codec->codec_id = AV_CODEC_ID_ESCAPE130; - break; - default: - avpriv_report_missing_feature(s, "Video format %i", - vst->codec->codec_tag); - vst->codec->codec_id = AV_CODEC_ID_NONE; - } - - // Audio headers - - // ARMovie supports multiple audio tracks; I don't have any - // samples, though. This code will ignore additional tracks. - audio_format = read_line_and_int(pb, &error); // audio format ID - if (audio_format) { - ast = avformat_new_stream(s, NULL); - if (!ast) - return AVERROR(ENOMEM); - ast->codec->codec_type = AVMEDIA_TYPE_AUDIO; - ast->codec->codec_tag = audio_format; - ast->codec->sample_rate = read_line_and_int(pb, &error); // audio bitrate - ast->codec->channels = read_line_and_int(pb, &error); // number of audio channels - ast->codec->bits_per_coded_sample = read_line_and_int(pb, &error); // audio bits per sample - // At least one sample uses 0 for ADPCM, which is really 4 bits - // per sample. - if (ast->codec->bits_per_coded_sample == 0) - ast->codec->bits_per_coded_sample = 4; - - ast->codec->bit_rate = ast->codec->sample_rate * - ast->codec->bits_per_coded_sample * - ast->codec->channels; - - ast->codec->codec_id = AV_CODEC_ID_NONE; - switch (audio_format) { - case 1: - if (ast->codec->bits_per_coded_sample == 16) { - // 16-bit audio is always signed - ast->codec->codec_id = AV_CODEC_ID_PCM_S16LE; - break; - } - // There are some other formats listed as legal per the spec; - // samples needed. - break; - case 101: - if (ast->codec->bits_per_coded_sample == 8) { - // The samples with this kind of audio that I have - // are all unsigned. - ast->codec->codec_id = AV_CODEC_ID_PCM_U8; - break; - } else if (ast->codec->bits_per_coded_sample == 4) { - ast->codec->codec_id = AV_CODEC_ID_ADPCM_IMA_EA_SEAD; - break; - } - break; - } - if (ast->codec->codec_id == AV_CODEC_ID_NONE) - avpriv_request_sample(s, "Audio format %i", audio_format); - avpriv_set_pts_info(ast, 32, 1, ast->codec->bit_rate); - } else { - for (i = 0; i < 3; i++) - error |= read_line(pb, line, sizeof(line)); - } - - rpl->frames_per_chunk = read_line_and_int(pb, &error); // video frames per chunk - if (rpl->frames_per_chunk > 1 && vst->codec->codec_tag != 124) - av_log(s, AV_LOG_WARNING, - "Don't know how to split frames for video format %i. " - "Video stream will be broken!\n", vst->codec->codec_tag); - - number_of_chunks = read_line_and_int(pb, &error); // number of chunks in the file - // The number in the header is actually the index of the last chunk. - number_of_chunks++; - - error |= read_line(pb, line, sizeof(line)); // "even" chunk size in bytes - error |= read_line(pb, line, sizeof(line)); // "odd" chunk size in bytes - chunk_catalog_offset = // offset of the "chunk catalog" - read_line_and_int(pb, &error); // (file index) - error |= read_line(pb, line, sizeof(line)); // offset to "helpful" sprite - error |= read_line(pb, line, sizeof(line)); // size of "helpful" sprite - error |= read_line(pb, line, sizeof(line)); // offset to key frame list - - // Read the index - avio_seek(pb, chunk_catalog_offset, SEEK_SET); - total_audio_size = 0; - for (i = 0; !error && i < number_of_chunks; i++) { - int64_t offset, video_size, audio_size; - error |= read_line(pb, line, sizeof(line)); - if (3 != sscanf(line, "%"SCNd64" , %"SCNd64" ; %"SCNd64, - &offset, &video_size, &audio_size)) { - error = -1; - continue; - } - av_add_index_entry(vst, offset, i * rpl->frames_per_chunk, - video_size, rpl->frames_per_chunk, 0); - if (ast) - av_add_index_entry(ast, offset + video_size, total_audio_size, - audio_size, audio_size * 8, 0); - total_audio_size += audio_size * 8; - } - - if (error) return AVERROR(EIO); - - return 0; -} - -static int rpl_read_packet(AVFormatContext *s, AVPacket *pkt) -{ - RPLContext *rpl = s->priv_data; - AVIOContext *pb = s->pb; - AVStream* stream; - AVIndexEntry* index_entry; - uint32_t ret; - - if (rpl->chunk_part == s->nb_streams) { - rpl->chunk_number++; - rpl->chunk_part = 0; - } - - stream = s->streams[rpl->chunk_part]; - - if (rpl->chunk_number >= stream->nb_index_entries) - return AVERROR_EOF; - - index_entry = &stream->index_entries[rpl->chunk_number]; - - if (rpl->frame_in_part == 0) - if (avio_seek(pb, index_entry->pos, SEEK_SET) < 0) - return AVERROR(EIO); - - if (stream->codec->codec_type == AVMEDIA_TYPE_VIDEO && - stream->codec->codec_tag == 124) { - // We have to split Escape 124 frames because there are - // multiple frames per chunk in Escape 124 samples. - uint32_t frame_size; - - avio_skip(pb, 4); /* flags */ - frame_size = avio_rl32(pb); - if (avio_seek(pb, -8, SEEK_CUR) < 0) - return AVERROR(EIO); - - ret = av_get_packet(pb, pkt, frame_size); - if (ret != frame_size) { - av_free_packet(pkt); - return AVERROR(EIO); - } - pkt->duration = 1; - pkt->pts = index_entry->timestamp + rpl->frame_in_part; - pkt->stream_index = rpl->chunk_part; - - rpl->frame_in_part++; - if (rpl->frame_in_part == rpl->frames_per_chunk) { - rpl->frame_in_part = 0; - rpl->chunk_part++; - } - } else { - ret = av_get_packet(pb, pkt, index_entry->size); - if (ret != index_entry->size) { - av_free_packet(pkt); - return AVERROR(EIO); - } - - if (stream->codec->codec_type == AVMEDIA_TYPE_VIDEO) { - // frames_per_chunk should always be one here; the header - // parsing will warn if it isn't. - pkt->duration = rpl->frames_per_chunk; - } else { - // All the audio codecs supported in this container - // (at least so far) are constant-bitrate. - pkt->duration = ret * 8; - } - pkt->pts = index_entry->timestamp; - pkt->stream_index = rpl->chunk_part; - rpl->chunk_part++; - } - - // None of the Escape formats have keyframes, and the ADPCM - // format used doesn't have keyframes. - if (rpl->chunk_number == 0 && rpl->frame_in_part == 0) - pkt->flags |= AV_PKT_FLAG_KEY; - - return ret; -} - -AVInputFormat ff_rpl_demuxer = { - .name = "rpl", - .long_name = NULL_IF_CONFIG_SMALL("RPL / ARMovie"), - .priv_data_size = sizeof(RPLContext), - .read_probe = rpl_probe, - .read_header = rpl_read_header, - .read_packet = rpl_read_packet, -}; |