diff options
Diffstat (limited to 'contrib/ffmpeg/libavformat/mtv.c')
| -rw-r--r-- | contrib/ffmpeg/libavformat/mtv.c | 187 |
1 files changed, 0 insertions, 187 deletions
diff --git a/contrib/ffmpeg/libavformat/mtv.c b/contrib/ffmpeg/libavformat/mtv.c deleted file mode 100644 index 7a68ea97f..000000000 --- a/contrib/ffmpeg/libavformat/mtv.c +++ /dev/null @@ -1,187 +0,0 @@ -/* - * mtv demuxer - * Copyright (c) 2006 Reynaldo H. Verdejo Pinochet - * - * 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 mtv.c - * MTV demuxer. - */ - -#include "avformat.h" -#include "bswap.h" - -#define MTV_ASUBCHUNK_DATA_SIZE 500 -#define MTV_HEADER_SIZE 512 -#define MTV_AUDIO_PADDING_SIZE 12 -#define AUDIO_SAMPLING_RATE 44100 -#define VIDEO_SID 0 -#define AUDIO_SID 1 - -typedef struct MTVDemuxContext { - - unsigned int file_size; ///< filesize, not always right - unsigned int segments; ///< number of 512 byte segments - unsigned int audio_identifier; ///< 'MP3' on all files I have seen - unsigned int audio_br; ///< bitrate of audio chanel (mp3) - unsigned int img_colorfmt; ///< frame colorfmt rgb 565/555 - unsigned int img_bpp; ///< frame bits per pixel - unsigned int img_width; // - unsigned int img_height; // - unsigned int img_segment_size; ///< size of image segment - unsigned int video_fps; // - unsigned int audio_subsegments; ///< audio subsegments on one segment - - uint8_t audio_packet_count; - -} MTVDemuxContext; - -static int mtv_probe(AVProbeData *p) -{ - if(p->buf_size < 3) - return 0; - - /* Magic is 'AMV' */ - - if(*(p->buf) != 'A' || *(p->buf+1) != 'M' || *(p->buf+2) != 'V') - return 0; - - return AVPROBE_SCORE_MAX; -} - -static int mtv_read_header(AVFormatContext *s, AVFormatParameters *ap) -{ - MTVDemuxContext *mtv = s->priv_data; - ByteIOContext *pb = &s->pb; - AVStream *st; - - - url_fskip(pb, 3); - mtv->file_size = get_le32(pb); - mtv->segments = get_le32(pb); - url_fskip(pb, 32); - mtv->audio_identifier = get_le24(pb); - mtv->audio_br = get_le16(pb); - mtv->img_colorfmt = get_le24(pb); - mtv->img_bpp = get_byte(pb); - mtv->img_width = get_le16(pb); - mtv->img_height = get_le16(pb); - mtv->img_segment_size = get_le16(pb); - url_fskip(pb, 4); - mtv->audio_subsegments = get_le16(pb); - mtv->video_fps = (mtv->audio_br / 4) / mtv->audio_subsegments; - - /* FIXME Add sanity check here */ - - /* first packet is allways audio*/ - - mtv->audio_packet_count = 1; - - /* all systems go! init decoders */ - - /* video - raw rgb565 */ - - st = av_new_stream(s, VIDEO_SID); - if(!st) - return AVERROR_NOMEM; - - av_set_pts_info(st, 64, 1, mtv->video_fps); - st->codec->codec_type = CODEC_TYPE_VIDEO; - st->codec->codec_id = CODEC_ID_RAWVIDEO; - st->codec->codec_tag = MKTAG('R', 'G', 'B', mtv->img_bpp); - st->codec->width = mtv->img_width; - st->codec->height = mtv->img_height; - st->codec->bits_per_sample = mtv->img_bpp; - st->codec->sample_rate = mtv->video_fps; - - /* audio - mp3 */ - - st = av_new_stream(s, AUDIO_SID); - if(!st) - return AVERROR_NOMEM; - - av_set_pts_info(st, 64, 1, AUDIO_SAMPLING_RATE); - st->codec->codec_type = CODEC_TYPE_AUDIO; - st->codec->codec_id = CODEC_ID_MP3; - st->codec->bit_rate = mtv->audio_br; - st->need_parsing=1; - - /* Jump over header */ - - if(url_fseek(pb, MTV_HEADER_SIZE, SEEK_SET) != MTV_HEADER_SIZE) - return AVERROR_IO; - - return(0); - -} - -static int mtv_read_packet(AVFormatContext *s, AVPacket *pkt) -{ - MTVDemuxContext *mtv = s->priv_data; - ByteIOContext *pb = &s->pb; - int ret; -#ifndef WORDS_BIGENDIAN - int i; -#endif - - ret = 0; - - if(mtv->audio_subsegments >= mtv->audio_packet_count) - { - url_fskip(pb, MTV_AUDIO_PADDING_SIZE); - - ret = av_get_packet(pb, pkt, MTV_ASUBCHUNK_DATA_SIZE); - if(ret != MTV_ASUBCHUNK_DATA_SIZE) - return AVERROR_IO; - - mtv->audio_packet_count++; - pkt->stream_index = AUDIO_SID; - - }else - { - ret = av_get_packet(pb, pkt, mtv->img_segment_size); - if(ret != mtv->img_segment_size) - return AVERROR_IO; - -#ifndef WORDS_BIGENDIAN - - /* pkt->data is GGGRRRR BBBBBGGG - * and we need RRRRRGGG GGGBBBBB - * for PIX_FMT_RGB565 so here we - * just swap bytes as they come - */ - - for(i=0;i<mtv->img_segment_size/2;i++) - *((uint16_t *)pkt->data+i) = bswap_16(*((uint16_t *)pkt->data+i)); -#endif - mtv->audio_packet_count = 1; - pkt->stream_index = VIDEO_SID; - } - - return(ret); -} - -AVInputFormat mtv_demuxer = { - "MTV", - "MTV format", - sizeof(MTVDemuxContext), - mtv_probe, - mtv_read_header, - mtv_read_packet, -}; |