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Diffstat (limited to 'ffmpeg1/libavformat/rl2.c')
-rw-r--r--ffmpeg1/libavformat/rl2.c298
1 files changed, 0 insertions, 298 deletions
diff --git a/ffmpeg1/libavformat/rl2.c b/ffmpeg1/libavformat/rl2.c
deleted file mode 100644
index 800e12e..0000000
--- a/ffmpeg1/libavformat/rl2.c
+++ /dev/null
@@ -1,298 +0,0 @@
-/*
- * RL2 Format Demuxer
- * Copyright (c) 2008 Sascha Sommer (saschasommer@freenet.de)
- *
- * 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
- */
-
-/**
- * RL2 file demuxer
- * @file
- * @author Sascha Sommer (saschasommer@freenet.de)
- * @see http://wiki.multimedia.cx/index.php?title=RL2
- *
- * extradata:
- * 2 byte le initial drawing offset within 320x200 viewport
- * 4 byte le number of used colors
- * 256 * 3 bytes rgb palette
- * optional background_frame
- */
-
-#include "libavutil/intreadwrite.h"
-#include "libavutil/mathematics.h"
-#include "avformat.h"
-#include "internal.h"
-
-#define EXTRADATA1_SIZE (6 + 256 * 3) ///< video base, clr, palette
-
-#define FORM_TAG MKBETAG('F', 'O', 'R', 'M')
-#define RLV2_TAG MKBETAG('R', 'L', 'V', '2')
-#define RLV3_TAG MKBETAG('R', 'L', 'V', '3')
-
-typedef struct Rl2DemuxContext {
- unsigned int index_pos[2]; ///< indexes in the sample tables
-} Rl2DemuxContext;
-
-
-/**
- * check if the file is in rl2 format
- * @param p probe buffer
- * @return 0 when the probe buffer does not contain rl2 data, > 0 otherwise
- */
-static int rl2_probe(AVProbeData *p)
-{
-
- if(AV_RB32(&p->buf[0]) != FORM_TAG)
- return 0;
-
- if(AV_RB32(&p->buf[8]) != RLV2_TAG &&
- AV_RB32(&p->buf[8]) != RLV3_TAG)
- return 0;
-
- return AVPROBE_SCORE_MAX;
-}
-
-/**
- * read rl2 header data and setup the avstreams
- * @param s demuxer context
- * @return 0 on success, AVERROR otherwise
- */
-static av_cold int rl2_read_header(AVFormatContext *s)
-{
- AVIOContext *pb = s->pb;
- AVStream *st;
- unsigned int frame_count;
- unsigned int audio_frame_counter = 0;
- unsigned int video_frame_counter = 0;
- unsigned int back_size;
- unsigned short sound_rate;
- unsigned short rate;
- unsigned short channels;
- unsigned short def_sound_size;
- unsigned int signature;
- unsigned int pts_den = 11025; /* video only case */
- unsigned int pts_num = 1103;
- unsigned int* chunk_offset = NULL;
- int* chunk_size = NULL;
- int* audio_size = NULL;
- int i;
- int ret = 0;
-
- avio_skip(pb,4); /* skip FORM tag */
- back_size = avio_rl32(pb); /**< get size of the background frame */
- signature = avio_rb32(pb);
- avio_skip(pb, 4); /* data size */
- frame_count = avio_rl32(pb);
-
- /* disallow back_sizes and frame_counts that may lead to overflows later */
- if(back_size > INT_MAX/2 || frame_count > INT_MAX / sizeof(uint32_t))
- return AVERROR_INVALIDDATA;
-
- avio_skip(pb, 2); /* encoding mentod */
- sound_rate = avio_rl16(pb);
- rate = avio_rl16(pb);
- channels = avio_rl16(pb);
- def_sound_size = avio_rl16(pb);
-
- /** setup video stream */
- st = avformat_new_stream(s, NULL);
- if(!st)
- return AVERROR(ENOMEM);
-
- st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
- st->codec->codec_id = AV_CODEC_ID_RL2;
- st->codec->codec_tag = 0; /* no fourcc */
- st->codec->width = 320;
- st->codec->height = 200;
-
- /** allocate and fill extradata */
- st->codec->extradata_size = EXTRADATA1_SIZE;
-
- if(signature == RLV3_TAG && back_size > 0)
- st->codec->extradata_size += back_size;
-
- st->codec->extradata = av_mallocz(st->codec->extradata_size +
- FF_INPUT_BUFFER_PADDING_SIZE);
- if(!st->codec->extradata)
- return AVERROR(ENOMEM);
-
- if(avio_read(pb,st->codec->extradata,st->codec->extradata_size) !=
- st->codec->extradata_size)
- return AVERROR(EIO);
-
- /** setup audio stream if present */
- if(sound_rate){
- if(channels <= 0)
- return AVERROR_INVALIDDATA;
-
- pts_num = def_sound_size;
- pts_den = rate;
-
- st = avformat_new_stream(s, NULL);
- if (!st)
- return AVERROR(ENOMEM);
- st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
- st->codec->codec_id = AV_CODEC_ID_PCM_U8;
- st->codec->codec_tag = 1;
- st->codec->channels = channels;
- st->codec->bits_per_coded_sample = 8;
- st->codec->sample_rate = rate;
- 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 / 8;
- avpriv_set_pts_info(st,32,1,rate);
- }
-
- avpriv_set_pts_info(s->streams[0], 32, pts_num, pts_den);
-
- chunk_size = av_malloc(frame_count * sizeof(uint32_t));
- audio_size = av_malloc(frame_count * sizeof(uint32_t));
- chunk_offset = av_malloc(frame_count * sizeof(uint32_t));
-
- if(!chunk_size || !audio_size || !chunk_offset){
- av_free(chunk_size);
- av_free(audio_size);
- av_free(chunk_offset);
- return AVERROR(ENOMEM);
- }
-
- /** read offset and size tables */
- for(i=0; i < frame_count;i++)
- chunk_size[i] = avio_rl32(pb);
- for(i=0; i < frame_count;i++)
- chunk_offset[i] = avio_rl32(pb);
- for(i=0; i < frame_count;i++)
- audio_size[i] = avio_rl32(pb) & 0xFFFF;
-
- /** build the sample index */
- for(i=0;i<frame_count;i++){
- if(chunk_size[i] < 0 || audio_size[i] > chunk_size[i]){
- ret = AVERROR_INVALIDDATA;
- break;
- }
-
- if(sound_rate && audio_size[i]){
- av_add_index_entry(s->streams[1], chunk_offset[i],
- audio_frame_counter,audio_size[i], 0, AVINDEX_KEYFRAME);
- audio_frame_counter += audio_size[i] / channels;
- }
- av_add_index_entry(s->streams[0], chunk_offset[i] + audio_size[i],
- video_frame_counter,chunk_size[i]-audio_size[i],0,AVINDEX_KEYFRAME);
- ++video_frame_counter;
- }
-
-
- av_free(chunk_size);
- av_free(audio_size);
- av_free(chunk_offset);
-
- return ret;
-}
-
-/**
- * read a single audio or video packet
- * @param s demuxer context
- * @param pkt the packet to be filled
- * @return 0 on success, AVERROR otherwise
- */
-static int rl2_read_packet(AVFormatContext *s,
- AVPacket *pkt)
-{
- Rl2DemuxContext *rl2 = s->priv_data;
- AVIOContext *pb = s->pb;
- AVIndexEntry *sample = NULL;
- int i;
- int ret = 0;
- int stream_id = -1;
- int64_t pos = INT64_MAX;
-
- /** check if there is a valid video or audio entry that can be used */
- for(i=0; i<s->nb_streams; i++){
- if(rl2->index_pos[i] < s->streams[i]->nb_index_entries
- && s->streams[i]->index_entries[ rl2->index_pos[i] ].pos < pos){
- sample = &s->streams[i]->index_entries[ rl2->index_pos[i] ];
- pos= sample->pos;
- stream_id= i;
- }
- }
-
- if(stream_id == -1)
- return AVERROR_EOF;
-
- ++rl2->index_pos[stream_id];
-
- /** position the stream (will probably be there anyway) */
- avio_seek(pb, sample->pos, SEEK_SET);
-
- /** fill the packet */
- ret = av_get_packet(pb, pkt, sample->size);
- if(ret != sample->size){
- av_free_packet(pkt);
- return AVERROR(EIO);
- }
-
- pkt->stream_index = stream_id;
- pkt->pts = sample->timestamp;
-
- return ret;
-}
-
-/**
- * seek to a new timestamp
- * @param s demuxer context
- * @param stream_index index of the stream that should be seeked
- * @param timestamp wanted timestamp
- * @param flags direction and seeking mode
- * @return 0 on success, -1 otherwise
- */
-static int rl2_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
-{
- AVStream *st = s->streams[stream_index];
- Rl2DemuxContext *rl2 = s->priv_data;
- int i;
- int index = av_index_search_timestamp(st, timestamp, flags);
- if(index < 0)
- return -1;
-
- rl2->index_pos[stream_index] = index;
- timestamp = st->index_entries[index].timestamp;
-
- for(i=0; i < s->nb_streams; i++){
- AVStream *st2 = s->streams[i];
- index = av_index_search_timestamp(st2,
- av_rescale_q(timestamp, st->time_base, st2->time_base),
- flags | AVSEEK_FLAG_BACKWARD);
-
- if(index < 0)
- index = 0;
-
- rl2->index_pos[i] = index;
- }
-
- return 0;
-}
-
-AVInputFormat ff_rl2_demuxer = {
- .name = "rl2",
- .long_name = NULL_IF_CONFIG_SMALL("RL2"),
- .priv_data_size = sizeof(Rl2DemuxContext),
- .read_probe = rl2_probe,
- .read_header = rl2_read_header,
- .read_packet = rl2_read_packet,
- .read_seek = rl2_read_seek,
-};
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