ffmpeg source update for sep 09

source/patched-ffmpeg-mt/libavformat/idroq.c

Index: source/patched-ffmpeg-mt/libavformat/idroq.c
===================================================================
--- source/patched-ffmpeg-mt/libavformat/idroq.c	(revision 59334)
+++ source/patched-ffmpeg-mt/libavformat/idroq.c	(working copy)
@@ -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,
-};