They have no code in common.
OBJS-$(CONFIG_WEBM_MUXER) += matroskaenc.o matroska.o \
riff.o isom.o avc.o \
flacenc_header.o avlanguage.o
-OBJS-$(CONFIG_WSAUD_DEMUXER) += westwood.o
-OBJS-$(CONFIG_WSVQA_DEMUXER) += westwood.o
+OBJS-$(CONFIG_WSAUD_DEMUXER) += westwood_aud.o
+OBJS-$(CONFIG_WSVQA_DEMUXER) += westwood_vqa.o
OBJS-$(CONFIG_WTV_DEMUXER) += wtv.o asfdec.o asf.o asfcrypt.o \
avlanguage.o mpegts.o isom.o riff.o
OBJS-$(CONFIG_WV_DEMUXER) += wv.o apetag.o
+++ /dev/null
-/*
- * Westwood Studios Multimedia Formats Demuxer (VQA, AUD)
- * Copyright (c) 2003 The ffmpeg Project
- *
- * This file is part of Libav.
- *
- * Libav 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.
- *
- * Libav 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 Libav; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * @file
- * Westwood Studios VQA & AUD file demuxers
- * 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
- *
- * Implementation note: There is no definite file signature for AUD files.
- * The demuxer uses a probabilistic strategy for content detection. This
- * entails performing sanity checks on certain header values in order to
- * qualify a file. Refer to wsaud_probe() for the precise parameters.
- */
-
-#include "libavutil/intreadwrite.h"
-#include "avformat.h"
-#include "internal.h"
-
-#define AUD_HEADER_SIZE 12
-#define AUD_CHUNK_PREAMBLE_SIZE 8
-#define AUD_CHUNK_SIGNATURE 0x0000DEAF
-
-#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_FRAMERATE 15
-#define VQA_PREAMBLE_SIZE 8
-
-typedef struct WsAudDemuxContext {
- int audio_samplerate;
- int audio_channels;
- int audio_bits;
- enum CodecID audio_type;
- int audio_stream_index;
- int64_t audio_frame_counter;
-} WsAudDemuxContext;
-
-typedef struct WsVqaDemuxContext {
- int audio_samplerate;
- int audio_channels;
- int audio_bits;
-
- int audio_stream_index;
- int video_stream_index;
-
- int64_t audio_frame_counter;
-} WsVqaDemuxContext;
-
-static int wsaud_probe(AVProbeData *p)
-{
- int field;
-
- /* Probabilistic content detection strategy: There is no file signature
- * so perform sanity checks on various header parameters:
- * 8000 <= sample rate (16 bits) <= 48000 ==> 40001 acceptable numbers
- * flags <= 0x03 (2 LSBs are used) ==> 4 acceptable numbers
- * compression type (8 bits) = 1 or 99 ==> 2 acceptable numbers
- * first audio chunk signature (32 bits) ==> 1 acceptable number
- * The number space contains 2^64 numbers. There are 40001 * 4 * 2 * 1 =
- * 320008 acceptable number combinations.
- */
-
- if (p->buf_size < AUD_HEADER_SIZE + AUD_CHUNK_PREAMBLE_SIZE)
- return 0;
-
- /* check sample rate */
- field = AV_RL16(&p->buf[0]);
- if ((field < 8000) || (field > 48000))
- return 0;
-
- /* enforce the rule that the top 6 bits of this flags field are reserved (0);
- * this might not be true, but enforce it until deemed unnecessary */
- if (p->buf[10] & 0xFC)
- return 0;
-
- /* note: only check for WS IMA (type 99) right now since there is no
- * support for type 1 */
- if (p->buf[11] != 99)
- return 0;
-
- /* read ahead to the first audio chunk and validate the first header signature */
- if (AV_RL32(&p->buf[16]) != AUD_CHUNK_SIGNATURE)
- return 0;
-
- /* return 1/2 certainty since this file check is a little sketchy */
- return AVPROBE_SCORE_MAX / 2;
-}
-
-static int wsaud_read_header(AVFormatContext *s,
- AVFormatParameters *ap)
-{
- WsAudDemuxContext *wsaud = s->priv_data;
- AVIOContext *pb = s->pb;
- AVStream *st;
- unsigned char header[AUD_HEADER_SIZE];
-
- if (avio_read(pb, header, AUD_HEADER_SIZE) != AUD_HEADER_SIZE)
- return AVERROR(EIO);
- wsaud->audio_samplerate = AV_RL16(&header[0]);
- if (header[11] == 99)
- wsaud->audio_type = CODEC_ID_ADPCM_IMA_WS;
- else
- return AVERROR_INVALIDDATA;
-
- /* flag 0 indicates stereo */
- wsaud->audio_channels = (header[10] & 0x1) + 1;
- /* flag 1 indicates 16 bit audio */
- wsaud->audio_bits = (((header[10] & 0x2) >> 1) + 1) * 8;
-
- /* initialize the audio decoder stream */
- st = avformat_new_stream(s, NULL);
- if (!st)
- return AVERROR(ENOMEM);
- avpriv_set_pts_info(st, 33, 1, wsaud->audio_samplerate);
- st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
- st->codec->codec_id = wsaud->audio_type;
- st->codec->codec_tag = 0; /* no tag */
- st->codec->channels = wsaud->audio_channels;
- st->codec->sample_rate = wsaud->audio_samplerate;
- st->codec->bits_per_coded_sample = wsaud->audio_bits;
- st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
- st->codec->bits_per_coded_sample / 4;
- st->codec->block_align = st->codec->channels * st->codec->bits_per_coded_sample;
-
- wsaud->audio_stream_index = st->index;
- wsaud->audio_frame_counter = 0;
-
- return 0;
-}
-
-static int wsaud_read_packet(AVFormatContext *s,
- AVPacket *pkt)
-{
- WsAudDemuxContext *wsaud = s->priv_data;
- AVIOContext *pb = s->pb;
- unsigned char preamble[AUD_CHUNK_PREAMBLE_SIZE];
- unsigned int chunk_size;
- int ret = 0;
-
- if (avio_read(pb, preamble, AUD_CHUNK_PREAMBLE_SIZE) !=
- AUD_CHUNK_PREAMBLE_SIZE)
- return AVERROR(EIO);
-
- /* validate the chunk */
- if (AV_RL32(&preamble[4]) != AUD_CHUNK_SIGNATURE)
- return AVERROR_INVALIDDATA;
-
- chunk_size = AV_RL16(&preamble[0]);
- ret= av_get_packet(pb, pkt, chunk_size);
- if (ret != chunk_size)
- return AVERROR(EIO);
- pkt->stream_index = wsaud->audio_stream_index;
- pkt->pts = wsaud->audio_frame_counter;
- pkt->pts /= wsaud->audio_samplerate;
-
- /* 2 samples/byte, 1 or 2 samples per frame depending on stereo */
- wsaud->audio_frame_counter += (chunk_size * 2) / wsaud->audio_channels;
-
- return ret;
-}
-
-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,
- AVFormatParameters *ap)
-{
- WsVqaDemuxContext *wsvqa = s->priv_data;
- AVIOContext *pb = s->pb;
- AVStream *st;
- unsigned char *header;
- unsigned char scratch[VQA_PREAMBLE_SIZE];
- unsigned int chunk_tag;
- unsigned int chunk_size;
-
- /* initialize the video decoder stream */
- st = avformat_new_stream(s, NULL);
- if (!st)
- return AVERROR(ENOMEM);
- avpriv_set_pts_info(st, 33, 1, VQA_FRAMERATE);
- wsvqa->video_stream_index = st->index;
- st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
- st->codec->codec_id = 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 */
- st->codec->extradata_size = VQA_HEADER_SIZE;
- st->codec->extradata = av_mallocz(VQA_HEADER_SIZE + FF_INPUT_BUFFER_PADDING_SIZE);
- header = (unsigned char *)st->codec->extradata;
- if (avio_read(pb, st->codec->extradata, VQA_HEADER_SIZE) !=
- VQA_HEADER_SIZE) {
- av_free(st->codec->extradata);
- return AVERROR(EIO);
- }
- st->codec->width = AV_RL16(&header[6]);
- st->codec->height = AV_RL16(&header[8]);
-
- /* initialize the audio decoder stream for VQA v1 or nonzero samplerate */
- if (AV_RL16(&header[24]) || (AV_RL16(&header[0]) == 1 && AV_RL16(&header[2]) == 1)) {
- st = avformat_new_stream(s, NULL);
- if (!st)
- return AVERROR(ENOMEM);
- avpriv_set_pts_info(st, 33, 1, VQA_FRAMERATE);
- st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
- if (AV_RL16(&header[0]) == 1)
- st->codec->codec_id = CODEC_ID_WESTWOOD_SND1;
- else
- st->codec->codec_id = CODEC_ID_ADPCM_IMA_WS;
- st->codec->codec_tag = 0; /* no tag */
- st->codec->sample_rate = AV_RL16(&header[24]);
- if (!st->codec->sample_rate)
- st->codec->sample_rate = 22050;
- st->codec->channels = header[26];
- if (!st->codec->channels)
- st->codec->channels = 1;
- st->codec->bits_per_coded_sample = 16;
- st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
- st->codec->bits_per_coded_sample / 4;
- st->codec->block_align = st->codec->channels * st->codec->bits_per_coded_sample;
-
- wsvqa->audio_stream_index = st->index;
- wsvqa->audio_samplerate = st->codec->sample_rate;
- wsvqa->audio_channels = st->codec->channels;
- wsvqa->audio_frame_counter = 0;
- }
-
- /* 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) {
- av_free(st->codec->extradata);
- 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;
- unsigned char preamble[VQA_PREAMBLE_SIZE];
- unsigned int chunk_type;
- unsigned int 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 == SND2_TAG || chunk_type == SND1_TAG) && wsvqa->audio_channels == 0) {
- av_log(s, AV_LOG_ERROR, "audio chunk without any audio header information found\n");
- return AVERROR_INVALIDDATA;
- }
-
- if ((chunk_type == SND1_TAG) || (chunk_type == SND2_TAG) || (chunk_type == VQFR_TAG)) {
-
- if (av_new_packet(pkt, chunk_size))
- return AVERROR(EIO);
- ret = avio_read(pb, pkt->data, chunk_size);
- if (ret != chunk_size) {
- av_free_packet(pkt);
- return AVERROR(EIO);
- }
-
- if (chunk_type == SND2_TAG) {
- pkt->stream_index = wsvqa->audio_stream_index;
- /* 2 samples/byte, 1 or 2 samples per frame depending on stereo */
- wsvqa->audio_frame_counter += (chunk_size * 2) / wsvqa->audio_channels;
- } else if(chunk_type == SND1_TAG) {
- pkt->stream_index = wsvqa->audio_stream_index;
- /* unpacked size is stored in header */
- wsvqa->audio_frame_counter += AV_RL16(pkt->data) / wsvqa->audio_channels;
- } else {
- pkt->stream_index = wsvqa->video_stream_index;
- }
- /* stay on 16-bit alignment */
- if (skip_byte)
- avio_skip(pb, 1);
-
- return ret;
- } else {
- switch(chunk_type){
- case CMDS_TAG:
- case SND0_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;
-}
-
-#if CONFIG_WSAUD_DEMUXER
-AVInputFormat ff_wsaud_demuxer = {
- .name = "wsaud",
- .long_name = NULL_IF_CONFIG_SMALL("Westwood Studios audio format"),
- .priv_data_size = sizeof(WsAudDemuxContext),
- .read_probe = wsaud_probe,
- .read_header = wsaud_read_header,
- .read_packet = wsaud_read_packet,
-};
-#endif
-#if CONFIG_WSVQA_DEMUXER
-AVInputFormat ff_wsvqa_demuxer = {
- .name = "wsvqa",
- .long_name = NULL_IF_CONFIG_SMALL("Westwood Studios VQA format"),
- .priv_data_size = sizeof(WsVqaDemuxContext),
- .read_probe = wsvqa_probe,
- .read_header = wsvqa_read_header,
- .read_packet = wsvqa_read_packet,
-};
-#endif
--- /dev/null
+/*
+ * Westwood Studios AUD Format Demuxer
+ * Copyright (c) 2003 The ffmpeg Project
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Westwood Studios AUD 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
+ *
+ * Implementation note: There is no definite file signature for AUD files.
+ * The demuxer uses a probabilistic strategy for content detection. This
+ * entails performing sanity checks on certain header values in order to
+ * qualify a file. Refer to wsaud_probe() for the precise parameters.
+ */
+
+#include "libavutil/intreadwrite.h"
+#include "avformat.h"
+#include "internal.h"
+
+#define AUD_HEADER_SIZE 12
+#define AUD_CHUNK_PREAMBLE_SIZE 8
+#define AUD_CHUNK_SIGNATURE 0x0000DEAF
+
+typedef struct WsAudDemuxContext {
+ int audio_samplerate;
+ int audio_channels;
+ int audio_bits;
+ enum CodecID audio_type;
+ int audio_stream_index;
+ int64_t audio_frame_counter;
+} WsAudDemuxContext;
+
+static int wsaud_probe(AVProbeData *p)
+{
+ int field;
+
+ /* Probabilistic content detection strategy: There is no file signature
+ * so perform sanity checks on various header parameters:
+ * 8000 <= sample rate (16 bits) <= 48000 ==> 40001 acceptable numbers
+ * flags <= 0x03 (2 LSBs are used) ==> 4 acceptable numbers
+ * compression type (8 bits) = 1 or 99 ==> 2 acceptable numbers
+ * first audio chunk signature (32 bits) ==> 1 acceptable number
+ * The number space contains 2^64 numbers. There are 40001 * 4 * 2 * 1 =
+ * 320008 acceptable number combinations.
+ */
+
+ if (p->buf_size < AUD_HEADER_SIZE + AUD_CHUNK_PREAMBLE_SIZE)
+ return 0;
+
+ /* check sample rate */
+ field = AV_RL16(&p->buf[0]);
+ if ((field < 8000) || (field > 48000))
+ return 0;
+
+ /* enforce the rule that the top 6 bits of this flags field are reserved (0);
+ * this might not be true, but enforce it until deemed unnecessary */
+ if (p->buf[10] & 0xFC)
+ return 0;
+
+ /* note: only check for WS IMA (type 99) right now since there is no
+ * support for type 1 */
+ if (p->buf[11] != 99)
+ return 0;
+
+ /* read ahead to the first audio chunk and validate the first header signature */
+ if (AV_RL32(&p->buf[16]) != AUD_CHUNK_SIGNATURE)
+ return 0;
+
+ /* return 1/2 certainty since this file check is a little sketchy */
+ return AVPROBE_SCORE_MAX / 2;
+}
+
+static int wsaud_read_header(AVFormatContext *s,
+ AVFormatParameters *ap)
+{
+ WsAudDemuxContext *wsaud = s->priv_data;
+ AVIOContext *pb = s->pb;
+ AVStream *st;
+ unsigned char header[AUD_HEADER_SIZE];
+
+ if (avio_read(pb, header, AUD_HEADER_SIZE) != AUD_HEADER_SIZE)
+ return AVERROR(EIO);
+ wsaud->audio_samplerate = AV_RL16(&header[0]);
+ if (header[11] == 99)
+ wsaud->audio_type = CODEC_ID_ADPCM_IMA_WS;
+ else
+ return AVERROR_INVALIDDATA;
+
+ /* flag 0 indicates stereo */
+ wsaud->audio_channels = (header[10] & 0x1) + 1;
+ /* flag 1 indicates 16 bit audio */
+ wsaud->audio_bits = (((header[10] & 0x2) >> 1) + 1) * 8;
+
+ /* initialize the audio decoder stream */
+ st = avformat_new_stream(s, NULL);
+ if (!st)
+ return AVERROR(ENOMEM);
+ avpriv_set_pts_info(st, 33, 1, wsaud->audio_samplerate);
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codec->codec_id = wsaud->audio_type;
+ st->codec->codec_tag = 0; /* no tag */
+ st->codec->channels = wsaud->audio_channels;
+ st->codec->sample_rate = wsaud->audio_samplerate;
+ st->codec->bits_per_coded_sample = wsaud->audio_bits;
+ st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
+ st->codec->bits_per_coded_sample / 4;
+ st->codec->block_align = st->codec->channels * st->codec->bits_per_coded_sample;
+
+ wsaud->audio_stream_index = st->index;
+ wsaud->audio_frame_counter = 0;
+
+ return 0;
+}
+
+static int wsaud_read_packet(AVFormatContext *s,
+ AVPacket *pkt)
+{
+ WsAudDemuxContext *wsaud = s->priv_data;
+ AVIOContext *pb = s->pb;
+ unsigned char preamble[AUD_CHUNK_PREAMBLE_SIZE];
+ unsigned int chunk_size;
+ int ret = 0;
+
+ if (avio_read(pb, preamble, AUD_CHUNK_PREAMBLE_SIZE) !=
+ AUD_CHUNK_PREAMBLE_SIZE)
+ return AVERROR(EIO);
+
+ /* validate the chunk */
+ if (AV_RL32(&preamble[4]) != AUD_CHUNK_SIGNATURE)
+ return AVERROR_INVALIDDATA;
+
+ chunk_size = AV_RL16(&preamble[0]);
+ ret= av_get_packet(pb, pkt, chunk_size);
+ if (ret != chunk_size)
+ return AVERROR(EIO);
+ pkt->stream_index = wsaud->audio_stream_index;
+ pkt->pts = wsaud->audio_frame_counter;
+ pkt->pts /= wsaud->audio_samplerate;
+
+ /* 2 samples/byte, 1 or 2 samples per frame depending on stereo */
+ wsaud->audio_frame_counter += (chunk_size * 2) / wsaud->audio_channels;
+
+ return ret;
+}
+
+AVInputFormat ff_wsaud_demuxer = {
+ .name = "wsaud",
+ .long_name = NULL_IF_CONFIG_SMALL("Westwood Studios audio format"),
+ .priv_data_size = sizeof(WsAudDemuxContext),
+ .read_probe = wsaud_probe,
+ .read_header = wsaud_read_header,
+ .read_packet = wsaud_read_packet,
+};
--- /dev/null
+/*
+ * Westwood Studios VQA Format Demuxer
+ * Copyright (c) 2003 The ffmpeg Project
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; 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_FRAMERATE 15
+#define VQA_PREAMBLE_SIZE 8
+
+typedef struct WsVqaDemuxContext {
+ int audio_samplerate;
+ int audio_channels;
+ int audio_bits;
+
+ int audio_stream_index;
+ int video_stream_index;
+
+ int64_t audio_frame_counter;
+} 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,
+ AVFormatParameters *ap)
+{
+ WsVqaDemuxContext *wsvqa = s->priv_data;
+ AVIOContext *pb = s->pb;
+ AVStream *st;
+ unsigned char *header;
+ unsigned char scratch[VQA_PREAMBLE_SIZE];
+ unsigned int chunk_tag;
+ unsigned int chunk_size;
+
+ /* initialize the video decoder stream */
+ st = avformat_new_stream(s, NULL);
+ if (!st)
+ return AVERROR(ENOMEM);
+ avpriv_set_pts_info(st, 33, 1, VQA_FRAMERATE);
+ wsvqa->video_stream_index = st->index;
+ st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+ st->codec->codec_id = 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 */
+ st->codec->extradata_size = VQA_HEADER_SIZE;
+ st->codec->extradata = av_mallocz(VQA_HEADER_SIZE + FF_INPUT_BUFFER_PADDING_SIZE);
+ header = (unsigned char *)st->codec->extradata;
+ if (avio_read(pb, st->codec->extradata, VQA_HEADER_SIZE) !=
+ VQA_HEADER_SIZE) {
+ av_free(st->codec->extradata);
+ return AVERROR(EIO);
+ }
+ st->codec->width = AV_RL16(&header[6]);
+ st->codec->height = AV_RL16(&header[8]);
+
+ /* initialize the audio decoder stream for VQA v1 or nonzero samplerate */
+ if (AV_RL16(&header[24]) || (AV_RL16(&header[0]) == 1 && AV_RL16(&header[2]) == 1)) {
+ st = avformat_new_stream(s, NULL);
+ if (!st)
+ return AVERROR(ENOMEM);
+ avpriv_set_pts_info(st, 33, 1, VQA_FRAMERATE);
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ if (AV_RL16(&header[0]) == 1)
+ st->codec->codec_id = CODEC_ID_WESTWOOD_SND1;
+ else
+ st->codec->codec_id = CODEC_ID_ADPCM_IMA_WS;
+ st->codec->codec_tag = 0; /* no tag */
+ st->codec->sample_rate = AV_RL16(&header[24]);
+ if (!st->codec->sample_rate)
+ st->codec->sample_rate = 22050;
+ st->codec->channels = header[26];
+ if (!st->codec->channels)
+ st->codec->channels = 1;
+ st->codec->bits_per_coded_sample = 16;
+ st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
+ st->codec->bits_per_coded_sample / 4;
+ st->codec->block_align = st->codec->channels * st->codec->bits_per_coded_sample;
+
+ wsvqa->audio_stream_index = st->index;
+ wsvqa->audio_samplerate = st->codec->sample_rate;
+ wsvqa->audio_channels = st->codec->channels;
+ wsvqa->audio_frame_counter = 0;
+ }
+
+ /* 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) {
+ av_free(st->codec->extradata);
+ 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;
+ unsigned char preamble[VQA_PREAMBLE_SIZE];
+ unsigned int chunk_type;
+ unsigned int 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 == SND2_TAG || chunk_type == SND1_TAG) && wsvqa->audio_channels == 0) {
+ av_log(s, AV_LOG_ERROR, "audio chunk without any audio header information found\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ if ((chunk_type == SND1_TAG) || (chunk_type == SND2_TAG) || (chunk_type == VQFR_TAG)) {
+
+ if (av_new_packet(pkt, chunk_size))
+ return AVERROR(EIO);
+ ret = avio_read(pb, pkt->data, chunk_size);
+ if (ret != chunk_size) {
+ av_free_packet(pkt);
+ return AVERROR(EIO);
+ }
+
+ if (chunk_type == SND2_TAG) {
+ pkt->stream_index = wsvqa->audio_stream_index;
+ /* 2 samples/byte, 1 or 2 samples per frame depending on stereo */
+ wsvqa->audio_frame_counter += (chunk_size * 2) / wsvqa->audio_channels;
+ } else if(chunk_type == SND1_TAG) {
+ pkt->stream_index = wsvqa->audio_stream_index;
+ /* unpacked size is stored in header */
+ wsvqa->audio_frame_counter += AV_RL16(pkt->data) / wsvqa->audio_channels;
+ } else {
+ pkt->stream_index = wsvqa->video_stream_index;
+ }
+ /* stay on 16-bit alignment */
+ if (skip_byte)
+ avio_skip(pb, 1);
+
+ return ret;
+ } else {
+ switch(chunk_type){
+ case CMDS_TAG:
+ case SND0_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 format"),
+ .priv_data_size = sizeof(WsVqaDemuxContext),
+ .read_probe = wsvqa_probe,
+ .read_header = wsvqa_read_header,
+ .read_packet = wsvqa_read_packet,
+};