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/bfi.c | |
| parent | a2e1bf3495b7bfefdaedb8fc737e969ab06df079 (diff) | |
making act segmenter
Diffstat (limited to 'ffmpeg1/libavformat/bfi.c')
| -rw-r--r-- | ffmpeg1/libavformat/bfi.c | 173 |
1 files changed, 0 insertions, 173 deletions
diff --git a/ffmpeg1/libavformat/bfi.c b/ffmpeg1/libavformat/bfi.c deleted file mode 100644 index a28e09a..0000000 --- a/ffmpeg1/libavformat/bfi.c +++ /dev/null @@ -1,173 +0,0 @@ -/* - * Brute Force & Ignorance (BFI) demuxer - * Copyright (c) 2008 Sisir Koppaka - * - * 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 Brute Force & Ignorance (.bfi) file demuxer - * @author Sisir Koppaka ( sisir.koppaka at gmail dot com ) - * @see http://wiki.multimedia.cx/index.php?title=BFI - */ - -#include "libavutil/channel_layout.h" -#include "libavutil/intreadwrite.h" -#include "avformat.h" -#include "internal.h" - -typedef struct BFIContext { - int nframes; - int audio_frame; - int video_frame; - int video_size; - int avflag; -} BFIContext; - -static int bfi_probe(AVProbeData * p) -{ - /* Check file header */ - if (AV_RL32(p->buf) == MKTAG('B', 'F', '&', 'I')) - return AVPROBE_SCORE_MAX; - else - return 0; -} - -static int bfi_read_header(AVFormatContext * s) -{ - BFIContext *bfi = s->priv_data; - AVIOContext *pb = s->pb; - AVStream *vstream; - AVStream *astream; - int fps, chunk_header; - - /* Initialize the video codec... */ - vstream = avformat_new_stream(s, NULL); - if (!vstream) - return AVERROR(ENOMEM); - - /* Initialize the audio codec... */ - astream = avformat_new_stream(s, NULL); - if (!astream) - return AVERROR(ENOMEM); - - /* Set the total number of frames. */ - avio_skip(pb, 8); - chunk_header = avio_rl32(pb); - bfi->nframes = avio_rl32(pb); - avio_rl32(pb); - avio_rl32(pb); - avio_rl32(pb); - fps = avio_rl32(pb); - avio_skip(pb, 12); - vstream->codec->width = avio_rl32(pb); - vstream->codec->height = avio_rl32(pb); - - /*Load the palette to extradata */ - avio_skip(pb, 8); - vstream->codec->extradata = av_malloc(768); - vstream->codec->extradata_size = 768; - avio_read(pb, vstream->codec->extradata, - vstream->codec->extradata_size); - - astream->codec->sample_rate = avio_rl32(pb); - - /* Set up the video codec... */ - avpriv_set_pts_info(vstream, 32, 1, fps); - vstream->codec->codec_type = AVMEDIA_TYPE_VIDEO; - vstream->codec->codec_id = AV_CODEC_ID_BFI; - vstream->codec->pix_fmt = AV_PIX_FMT_PAL8; - vstream->nb_frames = - vstream->duration = bfi->nframes; - - /* Set up the audio codec now... */ - astream->codec->codec_type = AVMEDIA_TYPE_AUDIO; - astream->codec->codec_id = AV_CODEC_ID_PCM_U8; - astream->codec->channels = 1; - astream->codec->channel_layout = AV_CH_LAYOUT_MONO; - astream->codec->bits_per_coded_sample = 8; - astream->codec->bit_rate = - astream->codec->sample_rate * astream->codec->bits_per_coded_sample; - avio_seek(pb, chunk_header - 3, SEEK_SET); - avpriv_set_pts_info(astream, 64, 1, astream->codec->sample_rate); - return 0; -} - - -static int bfi_read_packet(AVFormatContext * s, AVPacket * pkt) -{ - BFIContext *bfi = s->priv_data; - AVIOContext *pb = s->pb; - int ret, audio_offset, video_offset, chunk_size, audio_size = 0; - if (bfi->nframes == 0 || url_feof(pb)) { - return AVERROR_EOF; - } - - /* If all previous chunks were completely read, then find a new one... */ - if (!bfi->avflag) { - uint32_t state = 0; - while(state != MKTAG('S','A','V','I')){ - if (url_feof(pb)) - return AVERROR(EIO); - state = 256*state + avio_r8(pb); - } - /* Now that the chunk's location is confirmed, we proceed... */ - chunk_size = avio_rl32(pb); - avio_rl32(pb); - audio_offset = avio_rl32(pb); - avio_rl32(pb); - video_offset = avio_rl32(pb); - audio_size = video_offset - audio_offset; - bfi->video_size = chunk_size - video_offset; - - //Tossing an audio packet at the audio decoder. - ret = av_get_packet(pb, pkt, audio_size); - if (ret < 0) - return ret; - - pkt->pts = bfi->audio_frame; - bfi->audio_frame += ret; - } - - else { - - //Tossing a video packet at the video decoder. - ret = av_get_packet(pb, pkt, bfi->video_size); - if (ret < 0) - return ret; - - pkt->pts = bfi->video_frame; - bfi->video_frame += bfi->video_size ? ret / bfi->video_size : 1; - - /* One less frame to read. A cursory decrement. */ - bfi->nframes--; - } - - bfi->avflag = !bfi->avflag; - pkt->stream_index = bfi->avflag; - return ret; -} - -AVInputFormat ff_bfi_demuxer = { - .name = "bfi", - .long_name = NULL_IF_CONFIG_SMALL("Brute Force & Ignorance"), - .priv_data_size = sizeof(BFIContext), - .read_probe = bfi_probe, - .read_header = bfi_read_header, - .read_packet = bfi_read_packet, -}; |
