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Diffstat (limited to 'ffmpeg/libavformat/westwood_vqa.c')
-rw-r--r--ffmpeg/libavformat/westwood_vqa.c270
1 files changed, 0 insertions, 270 deletions
diff --git a/ffmpeg/libavformat/westwood_vqa.c b/ffmpeg/libavformat/westwood_vqa.c
deleted file mode 100644
index 2a988ad..0000000
--- a/ffmpeg/libavformat/westwood_vqa.c
+++ /dev/null
@@ -1,270 +0,0 @@
-/*
- * Westwood Studios VQA Format 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
- * Westwood Studios VQA file demuxer
- * by Mike Melanson (melanson@pcisys.net)
- * for more information on the Westwood file formats, visit:
- * http://www.pcisys.net/~melanson/codecs/
- * http://www.geocities.com/SiliconValley/8682/aud3.txt
- */
-
-#include "libavutil/intreadwrite.h"
-#include "avformat.h"
-#include "internal.h"
-
-#define FORM_TAG MKBETAG('F', 'O', 'R', 'M')
-#define WVQA_TAG MKBETAG('W', 'V', 'Q', 'A')
-#define VQHD_TAG MKBETAG('V', 'Q', 'H', 'D')
-#define FINF_TAG MKBETAG('F', 'I', 'N', 'F')
-#define SND0_TAG MKBETAG('S', 'N', 'D', '0')
-#define SND1_TAG MKBETAG('S', 'N', 'D', '1')
-#define SND2_TAG MKBETAG('S', 'N', 'D', '2')
-#define VQFR_TAG MKBETAG('V', 'Q', 'F', 'R')
-
-/* don't know what these tags are for, but acknowledge their existence */
-#define CINF_TAG MKBETAG('C', 'I', 'N', 'F')
-#define CINH_TAG MKBETAG('C', 'I', 'N', 'H')
-#define CIND_TAG MKBETAG('C', 'I', 'N', 'D')
-#define PINF_TAG MKBETAG('P', 'I', 'N', 'F')
-#define PINH_TAG MKBETAG('P', 'I', 'N', 'H')
-#define PIND_TAG MKBETAG('P', 'I', 'N', 'D')
-#define CMDS_TAG MKBETAG('C', 'M', 'D', 'S')
-
-#define VQA_HEADER_SIZE 0x2A
-#define VQA_PREAMBLE_SIZE 8
-
-typedef struct WsVqaDemuxContext {
- int version;
- int bps;
- int channels;
- int sample_rate;
- int audio_stream_index;
- int video_stream_index;
-} WsVqaDemuxContext;
-
-static int wsvqa_probe(AVProbeData *p)
-{
- /* need 12 bytes to qualify */
- if (p->buf_size < 12)
- return 0;
-
- /* check for the VQA signatures */
- if ((AV_RB32(&p->buf[0]) != FORM_TAG) ||
- (AV_RB32(&p->buf[8]) != WVQA_TAG))
- return 0;
-
- return AVPROBE_SCORE_MAX;
-}
-
-static int wsvqa_read_header(AVFormatContext *s)
-{
- WsVqaDemuxContext *wsvqa = s->priv_data;
- AVIOContext *pb = s->pb;
- AVStream *st;
- uint8_t *header;
- uint8_t scratch[VQA_PREAMBLE_SIZE];
- uint32_t chunk_tag;
- uint32_t chunk_size;
- int fps;
-
- /* initialize the video decoder stream */
- st = avformat_new_stream(s, NULL);
- if (!st)
- return AVERROR(ENOMEM);
- st->start_time = 0;
- wsvqa->video_stream_index = st->index;
- st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
- st->codec->codec_id = AV_CODEC_ID_WS_VQA;
- st->codec->codec_tag = 0; /* no fourcc */
-
- /* skip to the start of the VQA header */
- avio_seek(pb, 20, SEEK_SET);
-
- /* the VQA header needs to go to the decoder */
- if (ff_get_extradata(st->codec, pb, VQA_HEADER_SIZE) < 0)
- return AVERROR(ENOMEM);
- header = (uint8_t *)st->codec->extradata;
- st->codec->width = AV_RL16(&header[6]);
- st->codec->height = AV_RL16(&header[8]);
- fps = header[12];
- st->nb_frames =
- st->duration = AV_RL16(&header[4]);
- if (fps < 1 || fps > 30) {
- av_log(s, AV_LOG_ERROR, "invalid fps: %d\n", fps);
- return AVERROR_INVALIDDATA;
- }
- avpriv_set_pts_info(st, 64, 1, fps);
-
- wsvqa->version = AV_RL16(&header[ 0]);
- wsvqa->sample_rate = AV_RL16(&header[24]);
- wsvqa->channels = header[26];
- wsvqa->bps = header[27];
- wsvqa->audio_stream_index = -1;
-
- s->ctx_flags |= AVFMTCTX_NOHEADER;
-
- /* there are 0 or more chunks before the FINF chunk; iterate until
- * FINF has been skipped and the file will be ready to be demuxed */
- do {
- if (avio_read(pb, scratch, VQA_PREAMBLE_SIZE) != VQA_PREAMBLE_SIZE)
- return AVERROR(EIO);
- chunk_tag = AV_RB32(&scratch[0]);
- chunk_size = AV_RB32(&scratch[4]);
-
- /* catch any unknown header tags, for curiousity */
- switch (chunk_tag) {
- case CINF_TAG:
- case CINH_TAG:
- case CIND_TAG:
- case PINF_TAG:
- case PINH_TAG:
- case PIND_TAG:
- case FINF_TAG:
- case CMDS_TAG:
- break;
-
- default:
- av_log (s, AV_LOG_ERROR, " note: unknown chunk seen (%c%c%c%c)\n",
- scratch[0], scratch[1],
- scratch[2], scratch[3]);
- break;
- }
-
- avio_skip(pb, chunk_size);
- } while (chunk_tag != FINF_TAG);
-
- return 0;
-}
-
-static int wsvqa_read_packet(AVFormatContext *s,
- AVPacket *pkt)
-{
- WsVqaDemuxContext *wsvqa = s->priv_data;
- AVIOContext *pb = s->pb;
- int ret = -1;
- uint8_t preamble[VQA_PREAMBLE_SIZE];
- uint32_t chunk_type;
- uint32_t chunk_size;
- int skip_byte;
-
- while (avio_read(pb, preamble, VQA_PREAMBLE_SIZE) == VQA_PREAMBLE_SIZE) {
- chunk_type = AV_RB32(&preamble[0]);
- chunk_size = AV_RB32(&preamble[4]);
-
- skip_byte = chunk_size & 0x01;
-
- if ((chunk_type == SND0_TAG) || (chunk_type == SND1_TAG) ||
- (chunk_type == SND2_TAG) || (chunk_type == VQFR_TAG)) {
-
- ret= av_get_packet(pb, pkt, chunk_size);
- if (ret<0)
- return AVERROR(EIO);
-
- switch (chunk_type) {
- case SND0_TAG:
- case SND1_TAG:
- case SND2_TAG:
- if (wsvqa->audio_stream_index == -1) {
- AVStream *st = avformat_new_stream(s, NULL);
- if (!st)
- return AVERROR(ENOMEM);
-
- wsvqa->audio_stream_index = st->index;
- if (!wsvqa->sample_rate)
- wsvqa->sample_rate = 22050;
- if (!wsvqa->channels)
- wsvqa->channels = 1;
- if (!wsvqa->bps)
- wsvqa->bps = 8;
- st->codec->sample_rate = wsvqa->sample_rate;
- st->codec->bits_per_coded_sample = wsvqa->bps;
- st->codec->channels = wsvqa->channels;
- st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
-
- avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
-
- switch (chunk_type) {
- case SND0_TAG:
- if (wsvqa->bps == 16)
- st->codec->codec_id = AV_CODEC_ID_PCM_S16LE;
- else
- st->codec->codec_id = AV_CODEC_ID_PCM_U8;
- break;
- case SND1_TAG:
- st->codec->codec_id = AV_CODEC_ID_WESTWOOD_SND1;
- break;
- case SND2_TAG:
- st->codec->codec_id = AV_CODEC_ID_ADPCM_IMA_WS;
- if (ff_alloc_extradata(st->codec, 2))
- return AVERROR(ENOMEM);
- AV_WL16(st->codec->extradata, wsvqa->version);
- break;
- }
- }
-
- pkt->stream_index = wsvqa->audio_stream_index;
- switch (chunk_type) {
- case SND1_TAG:
- /* unpacked size is stored in header */
- if(pkt->data)
- pkt->duration = AV_RL16(pkt->data) / wsvqa->channels;
- break;
- case SND2_TAG:
- /* 2 samples/byte, 1 or 2 samples per frame depending on stereo */
- pkt->duration = (chunk_size * 2) / wsvqa->channels;
- break;
- }
- break;
- case VQFR_TAG:
- pkt->stream_index = wsvqa->video_stream_index;
- pkt->duration = 1;
- break;
- }
-
- /* stay on 16-bit alignment */
- if (skip_byte)
- avio_skip(pb, 1);
-
- return ret;
- } else {
- switch(chunk_type){
- case CMDS_TAG:
- break;
- default:
- av_log(s, AV_LOG_INFO, "Skipping unknown chunk 0x%08X\n", chunk_type);
- }
- avio_skip(pb, chunk_size + skip_byte);
- }
- }
-
- return ret;
-}
-
-AVInputFormat ff_wsvqa_demuxer = {
- .name = "wsvqa",
- .long_name = NULL_IF_CONFIG_SMALL("Westwood Studios VQA"),
- .priv_data_size = sizeof(WsVqaDemuxContext),
- .read_probe = wsvqa_probe,
- .read_header = wsvqa_read_header,
- .read_packet = wsvqa_read_packet,
-};
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