Chiebot-Mirror
/
FFmpeg
mirror of https://github.com/FFmpeg/FFmpeg.git
8
0
Fork 0
Code Issues Projects Releases Wiki Activity

support for Delphine Software .cin files demuxing / audio and video decoding, by Gregory Montoir %cyx A users P sourceforge P net%

Browse Source 
Originally committed as revision 6659 to svn://svn.ffmpeg.org/ffmpeg/trunk
pull/126/head
Baptiste Coudurier 19 years ago
parent 2b5269b51c
commit 72450e50a5
8 changed files with 603 additions and 0 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Unified View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 2
      libavcodec/Makefile
  2. 6
      libavcodec/allcodecs.c
  3. 4
      libavcodec/avcodec.h
  4. 362
      libavcodec/dsicinav.c
  5. 1
      libavformat/Makefile
  6. 3
      libavformat/allformats.c
  7. 1
      libavformat/allformats.h
  8. 224
      libavformat/dsicin.c

2
libavcodec/Makefile
Unescape View File

@ -65,6 +65,8 @@ OBJS-$(CONFIG_CLJR_ENCODER) += cljr.o
OBJS-$(CONFIG_COOK_DECODER) += cook.o OBJS-$(CONFIG_COOK_DECODER) += cook.o
OBJS-$(CONFIG_CSCD_DECODER) += cscd.o lzo.o OBJS-$(CONFIG_CSCD_DECODER) += cscd.o lzo.o
OBJS-$(CONFIG_CYUV_DECODER) += cyuv.o OBJS-$(CONFIG_CYUV_DECODER) += cyuv.o
OBJS-$(CONFIG_DSICINVIDEO_DECODER) += dsicinav.o
OBJS-$(CONFIG_DSICINAUDIO_DECODER) += dsicinav.o
OBJS-$(CONFIG_DVBSUB_DECODER) += dvbsubdec.o OBJS-$(CONFIG_DVBSUB_DECODER) += dvbsubdec.o
OBJS-$(CONFIG_DVBSUB_ENCODER) += dvbsub.o OBJS-$(CONFIG_DVBSUB_ENCODER) += dvbsub.o
OBJS-$(CONFIG_DVDSUB_DECODER) += dvdsub.o OBJS-$(CONFIG_DVDSUB_DECODER) += dvdsub.o

6
libavcodec/allcodecs.c
Unescape View File

@ -548,6 +548,12 @@ void avcodec_register_all(void)
#ifdef CONFIG_TARGA_DECODER #ifdef CONFIG_TARGA_DECODER
register_avcodec(&targa_decoder); register_avcodec(&targa_decoder);
#endif //CONFIG_TARGA_DECODER #endif //CONFIG_TARGA_DECODER
#ifdef CONFIG_DSICINVIDEO_DECODER
register_avcodec(&dsicinvideo_decoder);
#endif //CONFIG_DSICINVIDEO_DECODER
#ifdef CONFIG_DSICINAUDIO_DECODER
register_avcodec(&dsicinaudio_decoder);
#endif //CONFIG_DSICINAUDIO_DECODER
#if defined(CONFIG_AMR_NB) || defined(CONFIG_AMR_NB_FIXED) #if defined(CONFIG_AMR_NB) || defined(CONFIG_AMR_NB_FIXED)
#ifdef CONFIG_AMR_NB_DECODER #ifdef CONFIG_AMR_NB_DECODER

4
libavcodec/avcodec.h
Unescape View File

@ -145,6 +145,7 @@ enum CodecID {
CODEC_ID_VP6, CODEC_ID_VP6,
CODEC_ID_VP6F, CODEC_ID_VP6F,
CODEC_ID_TARGA, CODEC_ID_TARGA,
CODEC_ID_DSICINVIDEO,
/* various pcm "codecs" */ /* various pcm "codecs" */
CODEC_ID_PCM_S16LE= 0x10000, CODEC_ID_PCM_S16LE= 0x10000,
@ -228,6 +229,7 @@ enum CodecID {
CODEC_ID_SMACKAUDIO, CODEC_ID_SMACKAUDIO,
CODEC_ID_QCELP, CODEC_ID_QCELP,
CODEC_ID_WAVPACK, CODEC_ID_WAVPACK,
CODEC_ID_DSICINAUDIO,
/* subtitle codecs */ /* subtitle codecs */
CODEC_ID_DVD_SUBTITLE= 0x17000, CODEC_ID_DVD_SUBTITLE= 0x17000,
@ -2294,6 +2296,8 @@ extern AVCodec cavs_decoder;
extern AVCodec vmnc_decoder; extern AVCodec vmnc_decoder;
extern AVCodec wavpack_decoder; extern AVCodec wavpack_decoder;
extern AVCodec targa_decoder; extern AVCodec targa_decoder;
extern AVCodec dsicinvideo_decoder;
extern AVCodec dsicinaudio_decoder;
/* pcm codecs */ /* pcm codecs */
#define PCM_CODEC(id, name) \ #define PCM_CODEC(id, name) \

362
libavcodec/dsicinav.c
Unescape View File

@ -0,0 +1,362 @@
/*
* Delphine Software International CIN Audio/Video Decoders
* Copyright (c) 2006 Gregory Montoir (cyx@users.sourceforge.net)
*
* 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 dsicinav.c
* Delphine Software International CIN audio/video decoders
*/
#include "avcodec.h"
#include "common.h"
typedef enum CinVideoBitmapIndex {
CIN_CUR_BMP = 0, /* current */
CIN_PRE_BMP = 1, /* previous */
CIN_INT_BMP = 2 /* intermediate */
} CinVideoBitmapIndex;
typedef struct CinVideoContext {
AVCodecContext *avctx;
AVFrame frame;
unsigned int bitmap_size;
uint32_t palette[256];
uint8_t *bitmap_table[3];
} CinVideoContext;
typedef struct CinAudioContext {
AVCodecContext *avctx;
int initial_decode_frame;
int delta;
} CinAudioContext;
/* table defining a geometric sequence with multiplier = 32767 ^ (1 / 128) */
static const int16_t cinaudio_delta16_table[256] = {
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, -30210, -27853, -25680, -23677, -21829,
-20126, -18556, -17108, -15774, -14543, -13408, -12362, -11398,
-10508, -9689, -8933, -8236, -7593, -7001, -6455, -5951,
-5487, -5059, -4664, -4300, -3964, -3655, -3370, -3107,
-2865, -2641, -2435, -2245, -2070, -1908, -1759, -1622,
-1495, -1379, -1271, -1172, -1080, -996, -918, -847,
-781, -720, -663, -612, -564, -520, -479, -442,
-407, -376, -346, -319, -294, -271, -250, -230,
-212, -196, -181, -166, -153, -141, -130, -120,
-111, -102, -94, -87, -80, -74, -68, -62,
-58, -53, -49, -45, -41, -38, -35, -32,
-30, -27, -25, -23, -21, -20, -18, -17,
-15, -14, -13, -12, -11, -10, -9, -8,
-7, -6, -5, -4, -3, -2, -1, 0,
0, 1, 2, 3, 4, 5, 6, 7,
8, 9, 10, 11, 12, 13, 14, 15,
17, 18, 20, 21, 23, 25, 27, 30,
32, 35, 38, 41, 45, 49, 53, 58,
62, 68, 74, 80, 87, 94, 102, 111,
120, 130, 141, 153, 166, 181, 196, 212,
230, 250, 271, 294, 319, 346, 376, 407,
442, 479, 520, 564, 612, 663, 720, 781,
847, 918, 996, 1080, 1172, 1271, 1379, 1495,
1622, 1759, 1908, 2070, 2245, 2435, 2641, 2865,
3107, 3370, 3655, 3964, 4300, 4664, 5059, 5487,
5951, 6455, 7001, 7593, 8236, 8933, 9689, 10508,
11398, 12362, 13408, 14543, 15774, 17108, 18556, 20126,
21829, 23677, 25680, 27853, 30210, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0
};
static int cinvideo_decode_init(AVCodecContext *avctx)
{
CinVideoContext *cin = (CinVideoContext *)avctx->priv_data;
unsigned int i;
cin->avctx = avctx;
avctx->pix_fmt = PIX_FMT_PAL8;
avctx->has_b_frames = 0;
cin->frame.data[0] = NULL;
cin->bitmap_size = avctx->width * avctx->height;
for (i = 0; i < 3; ++i) {
cin->bitmap_table[i] = av_mallocz(cin->bitmap_size);
if (!cin->bitmap_table[i])
av_log(avctx, AV_LOG_ERROR, "Can't allocate bitmap buffers.\n");
}
return 0;
}
static void cin_apply_delta_data(const unsigned char *src, unsigned char *dst, int size)
{
while (size--)
*dst++ += *src++;
}
static int cin_decode_huffman(const unsigned char *src, int src_size, unsigned char *dst, int dst_size)
{
int b, huff_code = 0;
unsigned char huff_code_table[15];
unsigned char *dst_cur = dst;
unsigned char *dst_end = dst + dst_size;
const unsigned char *src_end = src + src_size;
memcpy(huff_code_table, src, 15); src += 15; src_size -= 15;
while (src < src_end) {
huff_code = *src++;
if ((huff_code >> 4) == 15) {
b = huff_code << 4;
huff_code = *src++;
*dst_cur++ = b | (huff_code >> 4);
} else
*dst_cur++ = huff_code_table[huff_code >> 4];
if (dst_cur >= dst_end)
break;
huff_code &= 15;
if (huff_code == 15) {
*dst_cur++ = *src++;
} else
*dst_cur++ = huff_code_table[huff_code];
if (dst_cur >= dst_end)
break;
}
return dst_cur - dst;
}
static void cin_decode_lzss(const unsigned char *src, int src_size, unsigned char *dst, int dst_size)
{
uint16_t cmd;
int i, sz, offset, code;
unsigned char *dst_end = dst + dst_size;
const unsigned char *src_end = src + src_size;
while (src < src_end && dst < dst_end) {
code = *src++;
for (i = 0; i < 8 && src < src_end && dst < dst_end; ++i) {
if (code & (1 << i)) {
*dst++ = *src++;
} else {
cmd = LE_16(src); src += 2;
offset = cmd >> 4;
sz = (cmd & 0xF) + 2;
/* don't use memcpy/memmove here as the decoding routine (ab)uses */
/* buffer overlappings to repeat bytes in the destination */
sz = FFMIN(sz, dst_end - dst);
while (sz--) {
*dst = *(dst - offset - 1);
++dst;
}
}
}
}
}
static void cin_decode_rle(const unsigned char *src, int src_size, unsigned char *dst, int dst_size)
{
int len, code;
unsigned char *dst_end = dst + dst_size;
const unsigned char *src_end = src + src_size;
while (src < src_end && dst < dst_end) {
code = *src++;
if (code & 0x80) {
len = code - 0x7F;
memset(dst, *src++, FFMIN(len, dst_end - dst));
} else {
len = code + 1;
memcpy(dst, src, FFMIN(len, dst_end - dst));
src += len;
}
dst += len;
}
}
static int cinvideo_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
uint8_t *buf, int buf_size)
{
CinVideoContext *cin = (CinVideoContext *)avctx->priv_data;
int i, y, palette_type, palette_colors_count, bitmap_frame_type, bitmap_frame_size;
cin->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
if (avctx->reget_buffer(avctx, &cin->frame)) {
av_log(cin->avctx, AV_LOG_ERROR, "delphinecinvideo: reget_buffer() failed to allocate a frame\n");
return -1;
}
palette_type = buf[0];
palette_colors_count = buf[1] | (buf[2] << 8);
bitmap_frame_type = buf[3];
buf += 4;
bitmap_frame_size = buf_size - 4;
/* handle palette */
if (palette_type == 0) {
for (i = 0; i < palette_colors_count; ++i) {
cin->palette[i] = (buf[2] << 16) | (buf[1] << 8) | buf[0];
buf += 3;
bitmap_frame_size -= 3;
}
} else {
for (i = 0; i < palette_colors_count; ++i) {
cin->palette[buf[0]] = (buf[3] << 16) | (buf[2] << 8) | buf[1];
buf += 4;
bitmap_frame_size -= 4;
}
}
memcpy(cin->frame.data[1], cin->palette, sizeof(cin->palette));
cin->frame.palette_has_changed = 1;
/* note: the decoding routines below assumes that surface.width = surface.pitch */
switch (bitmap_frame_type) {
case 9:
cin_decode_rle(buf, bitmap_frame_size,
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
break;
case 34:
cin_decode_rle(buf, bitmap_frame_size,
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
break;
case 35:
cin_decode_huffman(buf, bitmap_frame_size,
cin->bitmap_table[CIN_INT_BMP], cin->bitmap_size);
cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size,
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
break;
case 36:
bitmap_frame_size = cin_decode_huffman(buf, bitmap_frame_size,
cin->bitmap_table[CIN_INT_BMP], cin->bitmap_size);
cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size,
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
break;
case 37:
cin_decode_huffman(buf, bitmap_frame_size,
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
break;
case 38:
cin_decode_lzss(buf, bitmap_frame_size,
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
break;
case 39:
cin_decode_lzss(buf, bitmap_frame_size,
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
break;
}
for (y = 0; y < cin->avctx->height; ++y)
memcpy(cin->frame.data[0] + (cin->avctx->height - 1 - y) * cin->frame.linesize[0],
cin->bitmap_table[CIN_CUR_BMP] + y * cin->avctx->width,
cin->avctx->width);
SWAP(uint8_t *, cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_table[CIN_PRE_BMP]);
*data_size = sizeof(AVFrame);
*(AVFrame *)data = cin->frame;
return buf_size;
}
static int cinvideo_decode_end(AVCodecContext *avctx)
{
CinVideoContext *cin = (CinVideoContext *)avctx->priv_data;
int i;
if (cin->frame.data[0])
avctx->release_buffer(avctx, &cin->frame);
for (i = 0; i < 3; ++i)
av_free(cin->bitmap_table[i]);
return 0;
}
static int cinaudio_decode_init(AVCodecContext *avctx)
{
CinAudioContext *cin = (CinAudioContext *)avctx->priv_data;
cin->avctx = avctx;
cin->initial_decode_frame = 1;
cin->delta = 0;
return 0;
}
static int cinaudio_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
uint8_t *buf, int buf_size)
{
CinAudioContext *cin = (CinAudioContext *)avctx->priv_data;
uint8_t *src = buf;
int16_t *samples = (int16_t *)data;
if (cin->initial_decode_frame) {
cin->initial_decode_frame = 0;
cin->delta = (int16_t)LE_16(src); src += 2;
*samples++ = cin->delta;
buf_size -= 2;
}
while (buf_size > 0) {
cin->delta += cinaudio_delta16_table[*src++];
cin->delta = clip(cin->delta, -32768, 32767);
*samples++ = cin->delta;
--buf_size;
}
*data_size = (uint8_t *)samples - (uint8_t *)data;
return src - buf;
}
AVCodec dsicinvideo_decoder = {
"dsicinvideo",
CODEC_TYPE_VIDEO,
CODEC_ID_DSICINVIDEO,
sizeof(CinVideoContext),
cinvideo_decode_init,
NULL,
cinvideo_decode_end,
cinvideo_decode_frame,
CODEC_CAP_DR1,
};
AVCodec dsicinaudio_decoder = {
"dsicinaudio",
CODEC_TYPE_AUDIO,
CODEC_ID_DSICINAUDIO,
sizeof(CinAudioContext),
cinaudio_decode_init,
NULL,
NULL,
cinaudio_decode_frame,
};

1
libavformat/Makefile
Unescape View File

@ -29,6 +29,7 @@ OBJS-$(CONFIG_AVS_DEMUXER) += avs.o
OBJS-$(CONFIG_CRC_MUXER) += crc.o OBJS-$(CONFIG_CRC_MUXER) += crc.o
OBJS-$(CONFIG_FRAMECRC_MUXER) += crc.o OBJS-$(CONFIG_FRAMECRC_MUXER) += crc.o
OBJS-$(CONFIG_DAUD_DEMUXER) += daud.o OBJS-$(CONFIG_DAUD_DEMUXER) += daud.o
OBJS-$(CONFIG_DSICIN_DEMUXER) += dsicin.o
OBJS-$(CONFIG_DV_DEMUXER) += dv.o OBJS-$(CONFIG_DV_DEMUXER) += dv.o
OBJS-$(CONFIG_DV_MUXER) += dvenc.o OBJS-$(CONFIG_DV_MUXER) += dvenc.o
OBJS-$(CONFIG_EA_DEMUXER) += electronicarts.o OBJS-$(CONFIG_EA_DEMUXER) += electronicarts.o

3
libavformat/allformats.c
Unescape View File

@ -105,6 +105,9 @@ void av_register_all(void)
av_register_input_format(&dc1394_demuxer); av_register_input_format(&dc1394_demuxer);
#endif #endif
#endif /* CONFIG_DC1394 */ #endif /* CONFIG_DC1394 */
#ifdef CONFIG_DSICIN_DEMUXER
av_register_input_format(&dsicin_demuxer);
#endif
#ifdef CONFIG_DV1394 #ifdef CONFIG_DV1394
#ifdef CONFIG_DV1394_DEMUXER #ifdef CONFIG_DV1394_DEMUXER
av_register_input_format(&dv1394_demuxer); av_register_input_format(&dv1394_demuxer);

1
libavformat/allformats.h
Unescape View File

@ -43,6 +43,7 @@ extern AVOutputFormat crc_muxer;
extern AVOutputFormat framecrc_muxer; extern AVOutputFormat framecrc_muxer;
extern AVInputFormat daud_demuxer; extern AVInputFormat daud_demuxer;
extern AVInputFormat dc1394_demuxer; extern AVInputFormat dc1394_demuxer;
extern AVInputFormat dsicin_demuxer;
extern AVInputFormat dv1394_demuxer; extern AVInputFormat dv1394_demuxer;
extern AVInputFormat dv_demuxer; extern AVInputFormat dv_demuxer;
extern AVOutputFormat dv_muxer; extern AVOutputFormat dv_muxer;

224
libavformat/dsicin.c
Unescape View File

@ -0,0 +1,224 @@
/*
* Delphine Software International CIN File Demuxer
* Copyright (c) 2006 Gregory Montoir (cyx@users.sourceforge.net)
*
* 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 dsicin.c
* Delphine Software International CIN file demuxer
*/
#include "avformat.h"
typedef struct CinFileHeader {
int video_frame_size;
int video_frame_width;
int video_frame_height;
int audio_frequency;
int audio_bits;
int audio_stereo;
int audio_frame_size;
} CinFileHeader;
typedef struct CinFrameHeader {
int audio_frame_type;
int video_frame_type;
int pal_colors_count;
int audio_frame_size;
int video_frame_size;
} CinFrameHeader;
typedef struct CinDemuxContext {
int audio_stream_index;
int video_stream_index;
CinFileHeader file_header;
int64_t audio_stream_pts;
int64_t video_stream_pts;
CinFrameHeader frame_header;
int audio_buffer_size;
} CinDemuxContext;
static int cin_probe(AVProbeData *p)
{
if (p->buf_size < 18)
return 0;
/* header starts with this special marker */
if (LE_32(&p->buf[0]) != 0x55AA0000)
return 0;
/* for accuracy, check some header field values */
if (LE_32(&p->buf[12]) != 22050 || p->buf[16] != 16 || p->buf[17] != 0)
return 0;
return AVPROBE_SCORE_MAX;
}
static int cin_read_file_header(CinDemuxContext *cin, ByteIOContext *pb) {
CinFileHeader *hdr = &cin->file_header;
if (get_le32(pb) != 0x55AA0000)
return AVERROR_INVALIDDATA;
hdr->video_frame_size = get_le32(pb);
hdr->video_frame_width = get_le16(pb);
hdr->video_frame_height = get_le16(pb);
hdr->audio_frequency = get_le32(pb);
hdr->audio_bits = get_byte(pb);
hdr->audio_stereo = get_byte(pb);
hdr->audio_frame_size = get_le16(pb);
if (hdr->audio_frequency != 22050 || hdr->audio_bits != 16 || hdr->audio_stereo != 0)
return AVERROR_INVALIDDATA;
return 0;
}
static int cin_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
int rc;
CinDemuxContext *cin = (CinDemuxContext *)s->priv_data;
CinFileHeader *hdr = &cin->file_header;
ByteIOContext *pb = &s->pb;
AVStream *st;
rc = cin_read_file_header(cin, pb);
if (rc)
return rc;
cin->video_stream_pts = 0;
cin->audio_stream_pts = 0;
cin->audio_buffer_size = 0;
/* initialize the video decoder stream */
st = av_new_stream(s, 0);
if (!st)
return AVERROR_NOMEM;
av_set_pts_info(st, 32, 1, 12);
cin->video_stream_index = st->index;
st->codec->codec_type = CODEC_TYPE_VIDEO;
st->codec->codec_id = CODEC_ID_DSICINVIDEO;
st->codec->codec_tag = 0; /* no fourcc */
st->codec->width = hdr->video_frame_width;
st->codec->height = hdr->video_frame_height;
/* initialize the audio decoder stream */
st = av_new_stream(s, 0);
if (!st)
return AVERROR_NOMEM;
av_set_pts_info(st, 32, 1, 22050);
cin->audio_stream_index = st->index;
st->codec->codec_type = CODEC_TYPE_AUDIO;
st->codec->codec_id = CODEC_ID_DSICINAUDIO;
st->codec->codec_tag = 0; /* no tag */
st->codec->channels = 1;
st->codec->sample_rate = 22050;
st->codec->bits_per_sample = 16;
st->codec->bit_rate = st->codec->sample_rate * st->codec->bits_per_sample * st->codec->channels;
st->codec->block_align = st->codec->channels * st->codec->bits_per_sample;
return 0;
}
static int cin_read_frame_header(CinDemuxContext *cin, ByteIOContext *pb) {
CinFrameHeader *hdr = &cin->frame_header;
hdr->video_frame_type = get_byte(pb);
hdr->audio_frame_type = get_byte(pb);
hdr->pal_colors_count = get_le16(pb);
hdr->video_frame_size = get_le32(pb);
hdr->audio_frame_size = get_le32(pb);
if (url_feof(pb) || url_ferror(pb))
return AVERROR_IO;
if (get_le32(pb) != 0xAA55AA55)
return AVERROR_INVALIDDATA;
return 0;
}
static int cin_read_packet(AVFormatContext *s, AVPacket *pkt)
{
CinDemuxContext *cin = (CinDemuxContext *)s->priv_data;
ByteIOContext *pb = &s->pb;
CinFrameHeader *hdr = &cin->frame_header;
int rc, palette_type, pkt_size;
if (cin->audio_buffer_size == 0) {
rc = cin_read_frame_header(cin, pb);
if (rc)
return rc;
if ((int16_t)hdr->pal_colors_count < 0) {
hdr->pal_colors_count = -(int16_t)hdr->pal_colors_count;
palette_type = 1;
} else {
palette_type = 0;
}
/* palette and video packet */
pkt_size = (palette_type + 3) * hdr->pal_colors_count + hdr->video_frame_size;
if (av_new_packet(pkt, 4 + pkt_size))
return AVERROR_NOMEM;
pkt->stream_index = cin->video_stream_index;
pkt->pts = cin->video_stream_pts++;
pkt->data[0] = palette_type;
pkt->data[1] = hdr->pal_colors_count & 0xFF;
pkt->data[2] = hdr->pal_colors_count >> 8;
pkt->data[3] = hdr->video_frame_type;
if (get_buffer(pb, &pkt->data[4], pkt_size) != pkt_size)
return AVERROR_IO;
/* sound buffer will be processed on next read_packet() call */
cin->audio_buffer_size = hdr->audio_frame_size;
return 0;
}
/* audio packet */
if (av_new_packet(pkt, cin->audio_buffer_size))
return AVERROR_NOMEM;
pkt->stream_index = cin->audio_stream_index;
pkt->pts = cin->audio_stream_pts;
cin->audio_stream_pts += cin->audio_buffer_size * 2 / cin->file_header.audio_frame_size;
if (get_buffer(pb, pkt->data, cin->audio_buffer_size) != cin->audio_buffer_size)
return AVERROR_IO;
cin->audio_buffer_size = 0;
return 0;
}
AVInputFormat dsicin_demuxer = {
"dsicin",
"Delphine Software International CIN format",
sizeof(CinDemuxContext),
cin_probe,
cin_read_header,
cin_read_packet,
};
Write Preview
Loading…
Cancel
Save