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/bink.c | |
| parent | a2e1bf3495b7bfefdaedb8fc737e969ab06df079 (diff) | |
making act segmenter
Diffstat (limited to 'ffmpeg1/libavformat/bink.c')
| -rw-r--r-- | ffmpeg1/libavformat/bink.c | 287 |
1 files changed, 0 insertions, 287 deletions
diff --git a/ffmpeg1/libavformat/bink.c b/ffmpeg1/libavformat/bink.c deleted file mode 100644 index 887f70a..0000000 --- a/ffmpeg1/libavformat/bink.c +++ /dev/null @@ -1,287 +0,0 @@ -/* - * Bink demuxer - * Copyright (c) 2008-2010 Peter Ross (pross@xvid.org) - * Copyright (c) 2009 Daniel Verkamp (daniel@drv.nu) - * - * 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 - * Bink demuxer - * - * Technical details here: - * http://wiki.multimedia.cx/index.php?title=Bink_Container - */ - -#include "libavutil/channel_layout.h" -#include "libavutil/intreadwrite.h" -#include "avformat.h" -#include "internal.h" - -enum BinkAudFlags { - BINK_AUD_16BITS = 0x4000, ///< prefer 16-bit output - BINK_AUD_STEREO = 0x2000, - BINK_AUD_USEDCT = 0x1000, -}; - -#define BINK_EXTRADATA_SIZE 1 -#define BINK_MAX_AUDIO_TRACKS 256 -#define BINK_MAX_WIDTH 7680 -#define BINK_MAX_HEIGHT 4800 - -typedef struct { - uint32_t file_size; - - uint32_t num_audio_tracks; - int current_track; ///< audio track to return in next packet - int64_t video_pts; - int64_t audio_pts[BINK_MAX_AUDIO_TRACKS]; - - uint32_t remain_packet_size; -} BinkDemuxContext; - -static int probe(AVProbeData *p) -{ - const uint8_t *b = p->buf; - - if ( b[0] == 'B' && b[1] == 'I' && b[2] == 'K' && - (b[3] == 'b' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' || b[3] == 'i') && - AV_RL32(b+8) > 0 && // num_frames - AV_RL32(b+20) > 0 && AV_RL32(b+20) <= BINK_MAX_WIDTH && - AV_RL32(b+24) > 0 && AV_RL32(b+24) <= BINK_MAX_HEIGHT && - AV_RL32(b+28) > 0 && AV_RL32(b+32) > 0) // fps num,den - return AVPROBE_SCORE_MAX; - return 0; -} - -static int read_header(AVFormatContext *s) -{ - BinkDemuxContext *bink = s->priv_data; - AVIOContext *pb = s->pb; - uint32_t fps_num, fps_den; - AVStream *vst, *ast; - unsigned int i; - uint32_t pos, next_pos; - uint16_t flags; - int keyframe; - - vst = avformat_new_stream(s, NULL); - if (!vst) - return AVERROR(ENOMEM); - - vst->codec->codec_tag = avio_rl32(pb); - - bink->file_size = avio_rl32(pb) + 8; - vst->duration = avio_rl32(pb); - - if (vst->duration > 1000000) { - av_log(s, AV_LOG_ERROR, "invalid header: more than 1000000 frames\n"); - return AVERROR(EIO); - } - - if (avio_rl32(pb) > bink->file_size) { - av_log(s, AV_LOG_ERROR, - "invalid header: largest frame size greater than file size\n"); - return AVERROR(EIO); - } - - avio_skip(pb, 4); - - vst->codec->width = avio_rl32(pb); - vst->codec->height = avio_rl32(pb); - - fps_num = avio_rl32(pb); - fps_den = avio_rl32(pb); - if (fps_num == 0 || fps_den == 0) { - av_log(s, AV_LOG_ERROR, "invalid header: invalid fps (%d/%d)\n", fps_num, fps_den); - return AVERROR(EIO); - } - avpriv_set_pts_info(vst, 64, fps_den, fps_num); - vst->avg_frame_rate = av_inv_q(vst->time_base); - - vst->codec->codec_type = AVMEDIA_TYPE_VIDEO; - vst->codec->codec_id = AV_CODEC_ID_BINKVIDEO; - vst->codec->extradata = av_mallocz(4 + FF_INPUT_BUFFER_PADDING_SIZE); - if (!vst->codec->extradata) - return AVERROR(ENOMEM); - vst->codec->extradata_size = 4; - avio_read(pb, vst->codec->extradata, 4); - - bink->num_audio_tracks = avio_rl32(pb); - - if (bink->num_audio_tracks > BINK_MAX_AUDIO_TRACKS) { - av_log(s, AV_LOG_ERROR, - "invalid header: more than "AV_STRINGIFY(BINK_MAX_AUDIO_TRACKS)" audio tracks (%d)\n", - bink->num_audio_tracks); - return AVERROR(EIO); - } - - if (bink->num_audio_tracks) { - avio_skip(pb, 4 * bink->num_audio_tracks); - - for (i = 0; i < bink->num_audio_tracks; i++) { - ast = avformat_new_stream(s, NULL); - if (!ast) - return AVERROR(ENOMEM); - ast->codec->codec_type = AVMEDIA_TYPE_AUDIO; - ast->codec->codec_tag = 0; - ast->codec->sample_rate = avio_rl16(pb); - avpriv_set_pts_info(ast, 64, 1, ast->codec->sample_rate); - flags = avio_rl16(pb); - ast->codec->codec_id = flags & BINK_AUD_USEDCT ? - AV_CODEC_ID_BINKAUDIO_DCT : AV_CODEC_ID_BINKAUDIO_RDFT; - if (flags & BINK_AUD_STEREO) { - ast->codec->channels = 2; - ast->codec->channel_layout = AV_CH_LAYOUT_STEREO; - } else { - ast->codec->channels = 1; - ast->codec->channel_layout = AV_CH_LAYOUT_MONO; - } - ast->codec->extradata = av_mallocz(4 + FF_INPUT_BUFFER_PADDING_SIZE); - if (!ast->codec->extradata) - return AVERROR(ENOMEM); - ast->codec->extradata_size = 4; - AV_WL32(ast->codec->extradata, vst->codec->codec_tag); - } - - for (i = 0; i < bink->num_audio_tracks; i++) - s->streams[i + 1]->id = avio_rl32(pb); - } - - /* frame index table */ - next_pos = avio_rl32(pb); - for (i = 0; i < vst->duration; i++) { - pos = next_pos; - if (i == vst->duration - 1) { - next_pos = bink->file_size; - keyframe = 0; - } else { - next_pos = avio_rl32(pb); - keyframe = pos & 1; - } - pos &= ~1; - next_pos &= ~1; - - if (next_pos <= pos) { - av_log(s, AV_LOG_ERROR, "invalid frame index table\n"); - return AVERROR(EIO); - } - av_add_index_entry(vst, pos, i, next_pos - pos, 0, - keyframe ? AVINDEX_KEYFRAME : 0); - } - - avio_skip(pb, 4); - - bink->current_track = -1; - return 0; -} - -static int read_packet(AVFormatContext *s, AVPacket *pkt) -{ - BinkDemuxContext *bink = s->priv_data; - AVIOContext *pb = s->pb; - int ret; - - if (bink->current_track < 0) { - int index_entry; - AVStream *st = s->streams[0]; // stream 0 is video stream with index - - if (bink->video_pts >= st->duration) - return AVERROR_EOF; - - index_entry = av_index_search_timestamp(st, bink->video_pts, - AVSEEK_FLAG_ANY); - if (index_entry < 0) { - av_log(s, AV_LOG_ERROR, - "could not find index entry for frame %"PRId64"\n", - bink->video_pts); - return AVERROR(EIO); - } - - bink->remain_packet_size = st->index_entries[index_entry].size; - bink->current_track = 0; - } - - while (bink->current_track < bink->num_audio_tracks) { - uint32_t audio_size = avio_rl32(pb); - if (audio_size > bink->remain_packet_size - 4) { - av_log(s, AV_LOG_ERROR, - "frame %"PRId64": audio size in header (%u) > size of packet left (%u)\n", - bink->video_pts, audio_size, bink->remain_packet_size); - return AVERROR(EIO); - } - bink->remain_packet_size -= 4 + audio_size; - bink->current_track++; - if (audio_size >= 4) { - /* get one audio packet per track */ - if ((ret = av_get_packet(pb, pkt, audio_size)) < 0) - return ret; - pkt->stream_index = bink->current_track; - pkt->pts = bink->audio_pts[bink->current_track - 1]; - - /* Each audio packet reports the number of decompressed samples - (in bytes). We use this value to calcuate the audio PTS */ - if (pkt->size >= 4) - bink->audio_pts[bink->current_track -1] += - AV_RL32(pkt->data) / (2 * s->streams[bink->current_track]->codec->channels); - return 0; - } else { - avio_skip(pb, audio_size); - } - } - - /* get video packet */ - if ((ret = av_get_packet(pb, pkt, bink->remain_packet_size)) < 0) - return ret; - pkt->stream_index = 0; - pkt->pts = bink->video_pts++; - pkt->flags |= AV_PKT_FLAG_KEY; - - /* -1 instructs the next call to read_packet() to read the next frame */ - bink->current_track = -1; - - return 0; -} - -static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) -{ - BinkDemuxContext *bink = s->priv_data; - AVStream *vst = s->streams[0]; - - if (!s->pb->seekable) - return -1; - - /* seek to the first frame */ - if (avio_seek(s->pb, vst->index_entries[0].pos, SEEK_SET) < 0) - return -1; - - bink->video_pts = 0; - memset(bink->audio_pts, 0, sizeof(bink->audio_pts)); - bink->current_track = -1; - return 0; -} - -AVInputFormat ff_bink_demuxer = { - .name = "bink", - .long_name = NULL_IF_CONFIG_SMALL("Bink"), - .priv_data_size = sizeof(BinkDemuxContext), - .read_probe = probe, - .read_header = read_header, - .read_packet = read_packet, - .read_seek = read_seek, -}; |
