diff options
author | Aurelien Jacobs <aurel@gnuage.org> | 2010-08-29 20:37:33 +0400 |
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committer | Aurelien Jacobs <aurel@gnuage.org> | 2010-08-29 20:37:33 +0400 |
commit | 2aa751d2c867e0bf1ffd3725818ef2bbca03ce58 (patch) | |
tree | f6bfc0069beb8ef39feda0ad1b90b866a554bd39 /libavformat/idroq.c | |
parent | 54a73bb57f27ea5572f021cfa3bd045797703fe3 (diff) |
rename idroq.c to idroqdec.c
Originally committed as revision 24969 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavformat/idroq.c')
-rw-r--r-- | libavformat/idroq.c | 226 |
1 files changed, 0 insertions, 226 deletions
diff --git a/libavformat/idroq.c b/libavformat/idroq.c deleted file mode 100644 index 6b036d9c07..0000000000 --- a/libavformat/idroq.c +++ /dev/null @@ -1,226 +0,0 @@ -/* - * id RoQ (.roq) File Demuxer - * Copyright (c) 2003 The ffmpeg Project - * - * 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 - * id RoQ format file demuxer - * by Mike Melanson (melanson@pcisys.net) - * for more information on the .roq file format, visit: - * http://www.csse.monash.edu.au/~timf/ - */ - -#include "libavutil/intreadwrite.h" -#include "avformat.h" - -#define RoQ_MAGIC_NUMBER 0x1084 -#define RoQ_CHUNK_PREAMBLE_SIZE 8 -#define RoQ_AUDIO_SAMPLE_RATE 22050 -#define RoQ_CHUNKS_TO_SCAN 30 - -#define RoQ_INFO 0x1001 -#define RoQ_QUAD_CODEBOOK 0x1002 -#define RoQ_QUAD_VQ 0x1011 -#define RoQ_SOUND_MONO 0x1020 -#define RoQ_SOUND_STEREO 0x1021 - -typedef struct RoqDemuxContext { - - int width; - int height; - int audio_channels; - - int video_stream_index; - int audio_stream_index; - - int64_t video_pts; - unsigned int audio_frame_count; - -} RoqDemuxContext; - -static int roq_probe(AVProbeData *p) -{ - if ((AV_RL16(&p->buf[0]) != RoQ_MAGIC_NUMBER) || - (AV_RL32(&p->buf[2]) != 0xFFFFFFFF)) - return 0; - - return AVPROBE_SCORE_MAX; -} - -static int roq_read_header(AVFormatContext *s, - AVFormatParameters *ap) -{ - RoqDemuxContext *roq = s->priv_data; - ByteIOContext *pb = s->pb; - int framerate; - AVStream *st; - unsigned char preamble[RoQ_CHUNK_PREAMBLE_SIZE]; - - /* get the main header */ - if (get_buffer(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE) != - RoQ_CHUNK_PREAMBLE_SIZE) - return AVERROR(EIO); - framerate = AV_RL16(&preamble[6]); - - /* init private context parameters */ - roq->width = roq->height = roq->audio_channels = roq->video_pts = - roq->audio_frame_count = 0; - roq->audio_stream_index = -1; - - st = av_new_stream(s, 0); - if (!st) - return AVERROR(ENOMEM); - av_set_pts_info(st, 63, 1, framerate); - roq->video_stream_index = st->index; - st->codec->codec_type = AVMEDIA_TYPE_VIDEO; - st->codec->codec_id = CODEC_ID_ROQ; - st->codec->codec_tag = 0; /* no fourcc */ - - return 0; -} - -static int roq_read_packet(AVFormatContext *s, - AVPacket *pkt) -{ - RoqDemuxContext *roq = s->priv_data; - ByteIOContext *pb = s->pb; - int ret = 0; - unsigned int chunk_size; - unsigned int chunk_type; - unsigned int codebook_size; - unsigned char preamble[RoQ_CHUNK_PREAMBLE_SIZE]; - int packet_read = 0; - int64_t codebook_offset; - - while (!packet_read) { - - if (url_feof(s->pb)) - return AVERROR(EIO); - - /* get the next chunk preamble */ - if ((ret = get_buffer(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE)) != - RoQ_CHUNK_PREAMBLE_SIZE) - return AVERROR(EIO); - - chunk_type = AV_RL16(&preamble[0]); - chunk_size = AV_RL32(&preamble[2]); - if(chunk_size > INT_MAX) - return AVERROR_INVALIDDATA; - - switch (chunk_type) { - - case RoQ_INFO: - if (!roq->width || !roq->height) { - AVStream *st = s->streams[roq->video_stream_index]; - if (get_buffer(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE) != RoQ_CHUNK_PREAMBLE_SIZE) - return AVERROR(EIO); - st->codec->width = roq->width = AV_RL16(preamble); - st->codec->height = roq->height = AV_RL16(preamble + 2); - break; - } - /* don't care about this chunk anymore */ - url_fseek(pb, RoQ_CHUNK_PREAMBLE_SIZE, SEEK_CUR); - break; - - case RoQ_QUAD_CODEBOOK: - /* packet needs to contain both this codebook and next VQ chunk */ - codebook_offset = url_ftell(pb) - RoQ_CHUNK_PREAMBLE_SIZE; - codebook_size = chunk_size; - url_fseek(pb, codebook_size, SEEK_CUR); - if (get_buffer(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE) != - RoQ_CHUNK_PREAMBLE_SIZE) - return AVERROR(EIO); - chunk_size = AV_RL32(&preamble[2]) + RoQ_CHUNK_PREAMBLE_SIZE * 2 + - codebook_size; - - /* rewind */ - url_fseek(pb, codebook_offset, SEEK_SET); - - /* load up the packet */ - ret= av_get_packet(pb, pkt, chunk_size); - if (ret != chunk_size) - return AVERROR(EIO); - pkt->stream_index = roq->video_stream_index; - pkt->pts = roq->video_pts++; - - packet_read = 1; - break; - - case RoQ_SOUND_MONO: - case RoQ_SOUND_STEREO: - if (roq->audio_stream_index == -1) { - AVStream *st = av_new_stream(s, 1); - if (!st) - return AVERROR(ENOMEM); - av_set_pts_info(st, 32, 1, RoQ_AUDIO_SAMPLE_RATE); - roq->audio_stream_index = st->index; - st->codec->codec_type = AVMEDIA_TYPE_AUDIO; - st->codec->codec_id = CODEC_ID_ROQ_DPCM; - st->codec->codec_tag = 0; /* no tag */ - st->codec->channels = roq->audio_channels = chunk_type == RoQ_SOUND_STEREO ? 2 : 1; - st->codec->sample_rate = RoQ_AUDIO_SAMPLE_RATE; - st->codec->bits_per_coded_sample = 16; - st->codec->bit_rate = st->codec->channels * st->codec->sample_rate * - st->codec->bits_per_coded_sample; - st->codec->block_align = st->codec->channels * st->codec->bits_per_coded_sample; - } - case RoQ_QUAD_VQ: - /* load up the packet */ - if (av_new_packet(pkt, chunk_size + RoQ_CHUNK_PREAMBLE_SIZE)) - return AVERROR(EIO); - /* copy over preamble */ - memcpy(pkt->data, preamble, RoQ_CHUNK_PREAMBLE_SIZE); - - if (chunk_type == RoQ_QUAD_VQ) { - pkt->stream_index = roq->video_stream_index; - pkt->pts = roq->video_pts++; - } else { - pkt->stream_index = roq->audio_stream_index; - pkt->pts = roq->audio_frame_count; - roq->audio_frame_count += (chunk_size / roq->audio_channels); - } - - pkt->pos= url_ftell(pb); - ret = get_buffer(pb, pkt->data + RoQ_CHUNK_PREAMBLE_SIZE, - chunk_size); - if (ret != chunk_size) - ret = AVERROR(EIO); - - packet_read = 1; - break; - - default: - av_log(s, AV_LOG_ERROR, " unknown RoQ chunk (%04X)\n", chunk_type); - return AVERROR_INVALIDDATA; - break; - } - } - - return ret; -} - -AVInputFormat roq_demuxer = { - "RoQ", - NULL_IF_CONFIG_SMALL("id RoQ format"), - sizeof(RoqDemuxContext), - roq_probe, - roq_read_header, - roq_read_packet, -}; |