virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2025-01-29 22:00:58 +02:00
Code Issues Releases Activity

New demuxers: Sega FILM/CPK, Westwood VQA & AUD; new decoders: MS RLE &

Browse Source 
Video-1, Apple RPZA, Cinepak, Westwood IMA ADPCM

Originally committed as revision 2324 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Mike Melanson 2003-10-01 04:39:38 +00:00
parent f2f6134b9e
commit 2fdf638b0c
18 changed files with 2140 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
CREDITS
View File

@ -16,4 +16,6 @@ Michael Niedermayer
François Revol
Dieter Shirley
Juan J. Sierralta
Ewald Snel
Roberto Togni
Lionel Ulmer

8
Changelog
View File

@ -1,3 +1,11 @@
version <next>:
- Microsoft RLE video decoder
- Microsoft Video-1 decoder
- Apple Video (RPZA) decoder
- Cinepak decoder
- Sega FILM (CPK) file demuxer
- Westwood multimedia support (VQA/AUD file demuxer, audio decoder)
version 0.4.8:
- MPEG2 video encoding (Michael)

10
doc/ffmpeg-doc.texi
View File

@ -628,6 +628,10 @@ library:
@tab format used in various Interplay computer games
@item WC3 Movie @tab @tab X
@tab multimedia format used in Origin's Wing Commander III computer game
@item Sega FILM/CPK @tab @tab X
@tab used in many Sega Saturn console games
@item Westwood Studios VQA/AUD @tab @tab X
@tab Multimedia formats used in Westwood Studios games
@end multitable
@code{X} means that the encoding (resp. decoding) is supported.
@ -682,6 +686,10 @@ following image formats are supported:
@item Id RoQ @tab @tab X @tab used in Quake III, Jedi Knight 2, other computer games
@item Xan/WC3 @tab @tab X @tab used in Wing Commander III .MVE files
@item Interplay Video @tab @tab X @tab used in Interplay .MVE files
@item Apple Video @tab @tab X @tab fourcc: rpza
@item Cinepak @tab @tab X
@item Microsoft RLE @tab @tab X
@item Microsoft Video-1 @tab @tab X
@end multitable
@code{X} means that the encoding (resp. decoding) is supported.
@ -710,6 +718,8 @@ solutions.
@tab used in some Sega Saturn console games
@item Duck DK4 IMA ADPCM @tab @tab X
@tab used in some Sega Saturn console games
@item Westwood Studios IMA ADPCM @tab @tab X
@tab used in Westwood Studios games likes Command and Conquer
@item RA144 @tab @tab X
@tab Real 14400 bit/s codec
@item RA288 @tab @tab X

3
libavcodec/Makefile
View File

@ -17,7 +17,8 @@ OBJS= common.o utils.o mem.o allcodecs.o \
ratecontrol.o adpcm.o eval.o dv.o error_resilience.o \
fft.o mdct.o mace.o huffyuv.o cyuv.o opts.o raw.o h264.o golomb.o \
vp3.o asv1.o 4xm.o cabac.o ffv1.o ra144.o ra288.o vcr1.o cljr.o \
roqvideo.o dpcm.o interplayvideo.o xan.o
roqvideo.o dpcm.o interplayvideo.o xan.o rpza.o cinepak.o msrle.o \
msvideo1.o
ifeq ($(AMR_NB),yes)
ifeq ($(AMR_NB_FIXED),yes)

22
libavcodec/adpcm.c
View File

@ -22,7 +22,7 @@
* @file adpcm.c
* ADPCM codecs.
* First version by Francois Revol revol@free.fr
* Fringe ADPCM codecs (e.g., DK3 and DK4)
* Fringe ADPCM codecs (e.g., DK3, DK4, Westwood)
* by Mike Melanson (melanson@pcisys.net)
*
* Features and limitations:
@ -658,6 +658,25 @@ static int adpcm_decode_frame(AVCodecContext *avctx,
*samples++ = c->status[0].predictor - c->status[1].predictor;
}
break;
case CODEC_ID_ADPCM_IMA_WS:
/* no per-block initialization; just start decoding the data */
while (src < buf + buf_size) {
if (st) {
*samples++ = adpcm_ima_expand_nibble(&c->status[0],
(src[0] >> 4) & 0x0F);
*samples++ = adpcm_ima_expand_nibble(&c->status[1],
src[0] & 0x0F);
} else {
*samples++ = adpcm_ima_expand_nibble(&c->status[0],
(src[0] >> 4) & 0x0F);
*samples++ = adpcm_ima_expand_nibble(&c->status[0],
src[0] & 0x0F);
}
src++;
}
break;
default:
*data_size = 0;
return -1;
@ -692,6 +711,7 @@ ADPCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
ADPCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
ADPCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
ADPCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
ADPCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
ADPCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
ADPCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);

5
libavcodec/allcodecs.c
View File

@ -123,6 +123,10 @@ void avcodec_register_all(void)
register_avcodec(&roq_decoder);
register_avcodec(&interplay_video_decoder);
register_avcodec(&xan_wc3_decoder);
register_avcodec(&rpza_decoder);
register_avcodec(&cinepak_decoder);
register_avcodec(&msrle_decoder);
register_avcodec(&msvideo1_decoder);
#ifdef CONFIG_AC3
register_avcodec(&ac3_decoder);
#endif
@ -163,6 +167,7 @@ PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);

11
libavcodec/avcodec.h
View File

@ -74,6 +74,11 @@ enum CodecID {
CODEC_ID_INTERPLAY_VIDEO,
CODEC_ID_XAN_WC3,
CODEC_ID_XAN_WC4,
CODEC_ID_RPZA,
CODEC_ID_CINEPAK,
CODEC_ID_WS_VQA,
CODEC_ID_MSRLE,
CODEC_ID_MSVIDEO1,
/* various pcm "codecs" */
CODEC_ID_PCM_S16LE,
@ -90,6 +95,7 @@ enum CodecID {
CODEC_ID_ADPCM_IMA_WAV,
CODEC_ID_ADPCM_IMA_DK3,
CODEC_ID_ADPCM_IMA_DK4,
CODEC_ID_ADPCM_IMA_WS,
CODEC_ID_ADPCM_MS,
CODEC_ID_ADPCM_4XM,
@ -1419,6 +1425,10 @@ extern AVCodec mdec_decoder;
extern AVCodec roq_decoder;
extern AVCodec interplay_video_decoder;
extern AVCodec xan_wc3_decoder;
extern AVCodec rpza_decoder;
extern AVCodec cinepak_decoder;
extern AVCodec msrle_decoder;
extern AVCodec msvideo1_decoder;
extern AVCodec ra_144_decoder;
extern AVCodec ra_288_decoder;
extern AVCodec roq_dpcm_decoder;
@ -1445,6 +1455,7 @@ PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);

456
libavcodec/cinepak.c Normal file
View File

@ -0,0 +1,456 @@
/*
* Cinepak Video Decoder
* Copyright (C) 2003 the ffmpeg project
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/**
* @file cinepak.c
* Cinepak video decoder
* by Ewald Snel <ewald@rambo.its.tudelft.nl>
* For more information on the Cinepak algorithm, visit:
* http://www.csse.monash.edu.au/~timf/
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "common.h"
#include "avcodec.h"
#include "dsputil.h"
#define PALETTE_COUNT 256
#define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
#define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
(((uint8_t*)(x))[1] << 16) | \
(((uint8_t*)(x))[2] << 8) | \
((uint8_t*)(x))[3])
typedef struct {
uint8_t y0, y1, y2, y3;
uint8_t u, v;
} cvid_codebook_t;
#define MAX_STRIPS 32
typedef struct {
uint16_t id;
uint16_t x1, y1;
uint16_t x2, y2;
cvid_codebook_t v4_codebook[256];
cvid_codebook_t v1_codebook[256];
} cvid_strip_t;
typedef struct CinepakContext {
AVCodecContext *avctx;
DSPContext dsp;
AVFrame frame;
AVFrame prev_frame;
unsigned char *data;
int size;
unsigned char palette[PALETTE_COUNT * 4];
int palette_video;
cvid_strip_t strips[MAX_STRIPS];
} CinepakContext;
static void cinepak_decode_codebook (cvid_codebook_t *codebook,
int chunk_id, int size, uint8_t *data)
{
uint8_t *eod = (data + size);
uint32_t flag, mask;
int i, n;
/* check if this chunk contains 4- or 6-element vectors */
n = (chunk_id & 0x0400) ? 4 : 6;
flag = 0;
mask = 0;
for (i=0; i < 256; i++) {
if ((chunk_id & 0x0100) && !(mask >>= 1)) {
if ((data + 4) > eod)
break;
flag = BE_32 (data);
data += 4;
mask = 0x80000000;
}
if (!(chunk_id & 0x0100) || (flag & mask)) {
if ((data + n) > eod)
break;
if (n == 6) {
codebook[i].y0 = *data++;
codebook[i].y1 = *data++;
codebook[i].y2 = *data++;
codebook[i].y3 = *data++;
codebook[i].u = 128 + *data++;
codebook[i].v = 128 + *data++;
} else {
/* this codebook type indicates either greyscale or
* palettized video; if palettized, U & V components will
* not be used so it is safe to set them to 128 for the
* benefit of greyscale rendering in YUV420P */
codebook[i].y0 = *data++;
codebook[i].y1 = *data++;
codebook[i].y2 = *data++;
codebook[i].y3 = *data++;
codebook[i].u = 128;
codebook[i].v = 128;
}
}
}
}
static int cinepak_decode_vectors (CinepakContext *s, cvid_strip_t *strip,
int chunk_id, int size, uint8_t *data)
{
uint8_t *eod = (data + size);
uint32_t flag, mask;
cvid_codebook_t *codebook;
unsigned int i, j, x, y;
uint32_t iy[4];
uint32_t iu[2];
uint32_t iv[2];
flag = 0;
mask = 0;
for (y=strip->y1; y < strip->y2; y+=4) {
iy[0] = strip->x1 + (y * s->frame.linesize[0]);
iy[1] = iy[0] + s->frame.linesize[0];
iy[2] = iy[1] + s->frame.linesize[0];
iy[3] = iy[2] + s->frame.linesize[0];
iu[0] = (strip->x1/2) + ((y/2) * s->frame.linesize[1]);
iu[1] = iu[0] + s->frame.linesize[1];
iv[0] = (strip->x1/2) + ((y/2) * s->frame.linesize[2]);
iv[1] = iv[0] + s->frame.linesize[2];
for (x=strip->x1; x < strip->x2; x+=4) {
if ((chunk_id & 0x0100) && !(mask >>= 1)) {
if ((data + 4) > eod)
return -1;
flag = BE_32 (data);
data += 4;
mask = 0x80000000;
}
if (!(chunk_id & 0x0100) || (flag & mask)) {
if (!(chunk_id & 0x0200) && !(mask >>= 1)) {
if ((data + 4) > eod)
return -1;
flag = BE_32 (data);
data += 4;
mask = 0x80000000;
}
if ((chunk_id & 0x0200) || (~flag & mask)) {
if (data >= eod)
return -1;
codebook = &strip->v1_codebook[*data++];
s->frame.data[0][iy[0] + 0] = codebook->y0;
s->frame.data[0][iy[0] + 1] = codebook->y0;
s->frame.data[0][iy[1] + 0] = codebook->y0;
s->frame.data[0][iy[1] + 1] = codebook->y0;
if (!s->palette_video) {
s->frame.data[1][iu[0]] = codebook->u;
s->frame.data[2][iv[0]] = codebook->v;
}
s->frame.data[0][iy[0] + 2] = codebook->y0;
s->frame.data[0][iy[0] + 3] = codebook->y0;
s->frame.data[0][iy[1] + 2] = codebook->y0;
s->frame.data[0][iy[1] + 3] = codebook->y0;
if (!s->palette_video) {
s->frame.data[1][iu[0] + 1] = codebook->u;
s->frame.data[2][iv[0] + 1] = codebook->v;
}
s->frame.data[0][iy[2] + 0] = codebook->y0;
s->frame.data[0][iy[2] + 1] = codebook->y0;
s->frame.data[0][iy[3] + 0] = codebook->y0;
s->frame.data[0][iy[3] + 1] = codebook->y0;
if (!s->palette_video) {
s->frame.data[1][iu[1]] = codebook->u;
s->frame.data[2][iv[1]] = codebook->v;
}
s->frame.data[0][iy[2] + 2] = codebook->y0;
s->frame.data[0][iy[2] + 3] = codebook->y0;
s->frame.data[0][iy[3] + 2] = codebook->y0;
s->frame.data[0][iy[3] + 3] = codebook->y0;
if (!s->palette_video) {
s->frame.data[1][iu[1] + 1] = codebook->u;
s->frame.data[2][iv[1] + 1] = codebook->v;
}
} else if (flag & mask) {
if ((data + 4) > eod)
return -1;
codebook = &strip->v4_codebook[*data++];
s->frame.data[0][iy[0] + 0] = codebook->y0;
s->frame.data[0][iy[0] + 1] = codebook->y1;
s->frame.data[0][iy[1] + 0] = codebook->y2;
s->frame.data[0][iy[1] + 1] = codebook->y3;
if (!s->palette_video) {
s->frame.data[1][iu[0]] = codebook->u;
s->frame.data[2][iv[0]] = codebook->v;
}
codebook = &strip->v4_codebook[*data++];
s->frame.data[0][iy[0] + 2] = codebook->y0;
s->frame.data[0][iy[0] + 3] = codebook->y1;
s->frame.data[0][iy[1] + 2] = codebook->y2;
s->frame.data[0][iy[1] + 3] = codebook->y3;
if (!s->palette_video) {
s->frame.data[1][iu[0] + 1] = codebook->u;
s->frame.data[2][iv[0] + 1] = codebook->v;
}
codebook = &strip->v4_codebook[*data++];
s->frame.data[0][iy[2] + 0] = codebook->y0;
s->frame.data[0][iy[2] + 1] = codebook->y1;
s->frame.data[0][iy[3] + 0] = codebook->y2;
s->frame.data[0][iy[3] + 1] = codebook->y3;
if (!s->palette_video) {
s->frame.data[1][iu[1]] = codebook->u;
s->frame.data[2][iv[1]] = codebook->v;
}
codebook = &strip->v4_codebook[*data++];
s->frame.data[0][iy[2] + 2] = codebook->y0;
s->frame.data[0][iy[2] + 3] = codebook->y1;
s->frame.data[0][iy[3] + 2] = codebook->y2;
s->frame.data[0][iy[3] + 3] = codebook->y3;
if (!s->palette_video) {
s->frame.data[1][iu[1] + 1] = codebook->u;
s->frame.data[2][iv[1] + 1] = codebook->v;
}
}
} else {
/* copy from the previous frame */
for (i = 0; i < 4; i++) {
for (j = 0; j < 4; j++) {
s->frame.data[0][iy[i] + j] =
s->prev_frame.data[0][iy[i] + j];
}
}
for (i = 0; i < 2; i++) {
for (j = 0; j < 2; j++) {
s->frame.data[1][iu[i] + j] =
s->prev_frame.data[1][iu[i] + j];
s->frame.data[2][iv[i] + j] =
s->prev_frame.data[2][iv[i] + j];
}
}
}
iy[0] += 4; iy[1] += 4;
iy[2] += 4; iy[3] += 4;
iu[0] += 2; iu[1] += 2;
iv[0] += 2; iv[1] += 2;
}
}
return 0;
}
static int cinepak_decode_strip (CinepakContext *s,
cvid_strip_t *strip, uint8_t *data, int size)
{
uint8_t *eod = (data + size);
int chunk_id, chunk_size;
/* coordinate sanity checks */
if (strip->x1 >= s->avctx->width || strip->x2 > s->avctx->width ||
strip->y1 >= s->avctx->height || strip->y2 > s->avctx->height ||
strip->x1 >= strip->x2 || strip->y1 >= strip->y2)
return -1;
while ((data + 4) <= eod) {
chunk_id = BE_16 (&data[0]);
chunk_size = BE_16 (&data[2]) - 4;
data += 4;
chunk_size = ((data + chunk_size) > eod) ? (eod - data) : chunk_size;
switch (chunk_id) {
case 0x2000:
case 0x2100:
case 0x2400:
case 0x2500:
cinepak_decode_codebook (strip->v4_codebook, chunk_id,
chunk_size, data);
break;
case 0x2200:
case 0x2300:
case 0x2600:
case 0x2700:
cinepak_decode_codebook (strip->v1_codebook, chunk_id,
chunk_size, data);
break;
case 0x3000:
case 0x3100:
case 0x3200:
return cinepak_decode_vectors (s, strip, chunk_id,
chunk_size, data);
}
data += chunk_size;
}
return -1;
}
static int cinepak_decode (CinepakContext *s)
{
uint8_t *eod = (s->data + s->size);
int i, result, strip_size, frame_flags, num_strips;
int y0 = 0;
if (s->size < 10)
return -1;
frame_flags = s->data[0];
num_strips = BE_16 (&s->data[8]);
s->data += 10;
if (num_strips > MAX_STRIPS)
num_strips = MAX_STRIPS;
for (i=0; i < num_strips; i++) {
if ((s->data + 12) > eod)
return -1;
s->strips[i].id = BE_16 (s->data);
s->strips[i].y1 = y0;
s->strips[i].x1 = 0;
s->strips[i].y2 = y0 + BE_16 (&s->data[8]);
s->strips[i].x2 = s->avctx->width;
strip_size = BE_16 (&s->data[2]) - 12;
s->data += 12;
strip_size = ((s->data + strip_size) > eod) ? (eod - s->data) : strip_size;
if ((i > 0) && !(frame_flags & 0x01)) {
memcpy (s->strips[i].v4_codebook, s->strips[i-1].v4_codebook,
sizeof(s->strips[i].v4_codebook));
memcpy (s->strips[i].v1_codebook, s->strips[i-1].v1_codebook,
sizeof(s->strips[i].v1_codebook));
}
result = cinepak_decode_strip (s, &s->strips[i], s->data, strip_size);
if (result != 0)
return result;
s->data += strip_size;
y0 = s->strips[i].y2;
}
return 0;
}
static int cinepak_decode_init(AVCodecContext *avctx)
{
CinepakContext *s = (CinepakContext *)avctx->priv_data;
/*
int i;
unsigned char r, g, b;
unsigned char *raw_palette;
unsigned int *palette32;
*/
s->avctx = avctx;
// check for paletted data
s->palette_video = 0;
avctx->pix_fmt = PIX_FMT_YUV420P;
avctx->has_b_frames = 0;
dsputil_init(&s->dsp, avctx);
s->frame.data[0] = s->prev_frame.data[0] = NULL;
return 0;
}
static int cinepak_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
uint8_t *buf, int buf_size)
{
CinepakContext *s = (CinepakContext *)avctx->priv_data;
s->data = buf;
s->size = buf_size;
if (avctx->get_buffer(avctx, &s->frame)) {
printf (" Cinepak: get_buffer() failed\n");
return -1;
}
cinepak_decode(s);
if (s->prev_frame.data[0])
avctx->release_buffer(avctx, &s->prev_frame);
/* shuffle frames */
s->prev_frame = s->frame;
*data_size = sizeof(AVFrame);
*(AVFrame*)data = s->frame;
/* report that the buffer was completely consumed */
return buf_size;
}
static int cinepak_decode_end(AVCodecContext *avctx)
{
CinepakContext *s = (CinepakContext *)avctx->priv_data;
if (s->prev_frame.data[0])
avctx->release_buffer(avctx, &s->prev_frame);
return 0;
}
AVCodec cinepak_decoder = {
"cinepak",
CODEC_TYPE_VIDEO,
CODEC_ID_CINEPAK,
sizeof(CinepakContext),
cinepak_decode_init,
NULL,
cinepak_decode_end,
cinepak_decode_frame,
CODEC_CAP_DR1,
};

219
libavcodec/msrle.c Normal file
View File

@ -0,0 +1,219 @@
/*
* Micrsoft RLE Video Decoder
* Copyright (C) 2003 the ffmpeg project
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/**
* @file msrle.c
* MS RLE Video Decoder by Mike Melanson (melanson@pcisys.net)
* For more information about the MS RLE format, visit:
* http://www.pcisys.net/~melanson/codecs/
*
* The MS RLE decoder outputs PAL8 colorspace data.
*
* Note that this decoder expects the palette colors from the end of the
* BITMAPINFO header passed through extradata.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "common.h"
#include "avcodec.h"
#include "dsputil.h"
typedef struct MsrleContext {
AVCodecContext *avctx;
AVFrame frame;
AVFrame prev_frame;
unsigned char *buf;
int size;
unsigned int palette[256];
} MsrleContext;
#define FETCH_NEXT_STREAM_BYTE() \
if (stream_ptr >= s->size) \
{ \
printf(" MS RLE: stream ptr just went out of bounds (1)\n"); \
return; \
} \
stream_byte = s->buf[stream_ptr++];
static void msrle_decode_pal8(MsrleContext *s)
{
int stream_ptr = 0;
unsigned char rle_code;
unsigned char extra_byte;
unsigned char stream_byte;
int pixel_ptr = 0;
int row_dec = s->frame.linesize[0];
int row_ptr = (s->avctx->height - 1) * row_dec;
int frame_size = row_dec * s->avctx->height;
while (row_ptr >= 0) {
FETCH_NEXT_STREAM_BYTE();
rle_code = stream_byte;
if (rle_code == 0) {
/* fetch the next byte to see how to handle escape code */
FETCH_NEXT_STREAM_BYTE();
if (stream_byte == 0) {
/* line is done, goto the next one */
row_ptr -= row_dec;
pixel_ptr = 0;
} else if (stream_byte == 1) {
/* decode is done */
return;
} else if (stream_byte == 2) {
/* reposition frame decode coordinates */
FETCH_NEXT_STREAM_BYTE();
pixel_ptr += stream_byte;
FETCH_NEXT_STREAM_BYTE();
row_ptr -= stream_byte * row_dec;
} else {
/* copy pixels from encoded stream */
if ((row_ptr + pixel_ptr + stream_byte > frame_size) ||
(row_ptr < 0)) {
printf(" MS RLE: frame ptr just went out of bounds (1)\n");
return;
}
rle_code = stream_byte;
extra_byte = stream_byte & 0x01;
if (stream_ptr + rle_code + extra_byte > s->size) {
printf(" MS RLE: stream ptr just went out of bounds (2)\n");
return;
}
while (rle_code--) {
FETCH_NEXT_STREAM_BYTE();
s->frame.data[0][row_ptr + pixel_ptr] = stream_byte;
pixel_ptr++;
}
/* if the RLE code is odd, skip a byte in the stream */
if (extra_byte)
stream_ptr++;
}
} else {
/* decode a run of data */
if ((row_ptr + pixel_ptr + stream_byte > frame_size) ||
(row_ptr < 0)) {
printf(" MS RLE: frame ptr just went out of bounds (2)\n");
return;
}
FETCH_NEXT_STREAM_BYTE();
while(rle_code--) {
s->frame.data[0][row_ptr + pixel_ptr] = stream_byte;
pixel_ptr++;
}
}
}
/* make the palette available */
memcpy(s->frame.data[1], s->palette, 256 * 4);
/* one last sanity check on the way out */
if (stream_ptr < s->size)
printf(" MS RLE: ended frame decode with bytes left over (%d < %d)\n",
stream_ptr, s->size);
}
static int msrle_decode_init(AVCodecContext *avctx)
{
MsrleContext *s = (MsrleContext *)avctx->priv_data;
int i, j;
unsigned char *palette;
s->avctx = avctx;
avctx->pix_fmt = PIX_FMT_PAL8;
avctx->has_b_frames = 0;
s->frame.data[0] = s->prev_frame.data[0] = NULL;
/* convert palette */
palette = (unsigned char *)s->avctx->extradata;
memset (s->palette, 0, 256 * 4);
for (i = 0, j = 0; i < s->avctx->extradata_size / 4; i++, j += 4)
s->palette[i] =
(palette[j + 2] << 16) |
(palette[j + 1] << 8) |
(palette[j + 0] << 0);
return 0;
}
static int msrle_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
uint8_t *buf, int buf_size)
{
MsrleContext *s = (MsrleContext *)avctx->priv_data;
s->buf = buf;
s->size = buf_size;
if (avctx->get_buffer(avctx, &s->frame)) {
printf (" MS RLE: get_buffer() failed\n");
return -1;
}
/* grossly inefficient, but...oh well */
memcpy(s->frame.data[0], s->prev_frame.data[0],
s->frame.linesize[0] * s->avctx->height);
msrle_decode_pal8(s);
if (s->frame.data[0])
avctx->release_buffer(avctx, &s->frame);
/* shuffle frames */
s->prev_frame = s->frame;
*data_size = sizeof(AVFrame);
*(AVFrame*)data = s->frame;
/* report that the buffer was completely consumed */
return buf_size;
}
static int msrle_decode_end(AVCodecContext *avctx)
{
MsrleContext *s = (MsrleContext *)avctx->priv_data;
/* release the last frame */
if (s->prev_frame.data[0])
avctx->release_buffer(avctx, &s->prev_frame);
return 0;
}
AVCodec msrle_decoder = {
"msrle",
CODEC_TYPE_VIDEO,
CODEC_ID_MSRLE,
sizeof(MsrleContext),
msrle_decode_init,
NULL,
msrle_decode_end,
msrle_decode_frame,
CODEC_CAP_DR1,
};

378
libavcodec/msvideo1.c Normal file
View File

@ -0,0 +1,378 @@
/*
* Microsoft Video-1 Decoder
* Copyright (C) 2003 the ffmpeg project
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/**
* @file msvideo1.c
* Microsoft Video-1 Decoder by Mike Melanson (melanson@pcisys.net)
* For more information about the MS Video-1 format, visit:
* http://www.pcisys.net/~melanson/codecs/
*
* This decoder outputs either PAL8 or RGB555 data, depending on the
* whether a RGB palette was passed through via extradata; if the extradata
* is present, then the data is PAL8; RGB555 otherwise.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "common.h"
#include "avcodec.h"
#include "dsputil.h"
#define PALETTE_COUNT 256
#define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
#define CHECK_STREAM_PTR(n) \
if ((stream_ptr + n) > s->size ) { \
printf (" MS Video-1 warning: stream_ptr out of bounds (%d >= %d)\n", \
stream_ptr + n, s->size); \
return; \
}
#define COPY_PREV_BLOCK() \
pixel_ptr = block_ptr; \
for (pixel_y = 0; pixel_y < 4; pixel_y++) { \
for (pixel_x = 0; pixel_x < 4; pixel_x++, pixel_ptr++) \
pixels[pixel_ptr] = prev_pixels[pixel_ptr]; \
pixel_ptr -= row_dec; \
}
typedef struct Msvideo1Context {
AVCodecContext *avctx;
DSPContext dsp;
AVFrame frame;
AVFrame prev_frame;
unsigned char *buf;
int size;
int mode_8bit; /* if it's not 8-bit, it's 16-bit */
unsigned char palette[PALETTE_COUNT * 4];
} Msvideo1Context;
static int msvideo1_decode_init(AVCodecContext *avctx)
{
Msvideo1Context *s = (Msvideo1Context *)avctx->priv_data;
int i;
unsigned char r, g, b;
unsigned char *raw_palette;
unsigned int *palette32;
s->avctx = avctx;
/* figure out the colorspace based on the presence of a palette in
* extradata */
if (s->avctx->extradata_size) {
s->mode_8bit = 1;
/* load up the palette */
palette32 = (unsigned int *)s->palette;
raw_palette = (unsigned char *)s->avctx->extradata;
for (i = 0; i < s->avctx->extradata_size / 4; i++) {
b = *raw_palette++;
g = *raw_palette++;
r = *raw_palette++;
raw_palette++;
palette32[i] = (r << 16) | (g << 8) | (b);
}
avctx->pix_fmt = PIX_FMT_PAL8;
} else {
s->mode_8bit = 0;
avctx->pix_fmt = PIX_FMT_RGB555;
}
avctx->has_b_frames = 0;
dsputil_init(&s->dsp, avctx);
s->frame.data[0] = s->prev_frame.data[0] = NULL;
return 0;
}
static void msvideo1_decode_8bit(Msvideo1Context *s)
{
int block_ptr, pixel_ptr;
int total_blocks;
int pixel_x, pixel_y; /* pixel width and height iterators */
int block_x, block_y; /* block width and height iterators */
int blocks_wide, blocks_high; /* width and height in 4x4 blocks */
int block_inc;
int row_dec;
/* decoding parameters */
int stream_ptr;
unsigned char byte_a, byte_b;
unsigned short flags;
int skip_blocks;
unsigned char colors[8];
unsigned char *pixels = s->frame.data[0];
unsigned char *prev_pixels = s->prev_frame.data[0];
int stride = s->frame.linesize[0];
stream_ptr = 0;
skip_blocks = 0;
blocks_wide = s->avctx->width / 4;
blocks_high = s->avctx->height / 4;
total_blocks = blocks_wide * blocks_high;
block_inc = 4;
row_dec = stride + 4;
for (block_y = blocks_high; block_y > 0; block_y--) {
block_ptr = ((block_y * 4) - 1) * stride;
for (block_x = blocks_wide; block_x > 0; block_x--) {
/* check if this block should be skipped */
if (skip_blocks) {
COPY_PREV_BLOCK();
block_ptr += block_inc;
skip_blocks--;
total_blocks--;
continue;
}
pixel_ptr = block_ptr;
/* get the next two bytes in the encoded data stream */
CHECK_STREAM_PTR(2);
byte_a = s->buf[stream_ptr++];
byte_b = s->buf[stream_ptr++];
/* check if the decode is finished */
if ((byte_a == 0) && (byte_b == 0) && (total_blocks == 0))
return;
else if ((byte_b & 0xFC) == 0x84) {
/* skip code, but don't count the current block */
skip_blocks = ((byte_b - 0x84) << 8) + byte_a - 1;
COPY_PREV_BLOCK();
} else if (byte_b < 0x80) {
/* 2-color encoding */
flags = (byte_b << 8) | byte_a;
CHECK_STREAM_PTR(2);
colors[0] = s->buf[stream_ptr++];
colors[1] = s->buf[stream_ptr++];
for (pixel_y = 0; pixel_y < 4; pixel_y++) {
for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
pixels[pixel_ptr++] = colors[(flags & 0x1) ^ 1];
pixel_ptr -= row_dec;
}
} else if (byte_b >= 0x90) {
/* 8-color encoding */
flags = (byte_b << 8) | byte_a;
CHECK_STREAM_PTR(8);
memcpy(colors, &s->buf[stream_ptr], 8);
stream_ptr += 8;
for (pixel_y = 0; pixel_y < 4; pixel_y++) {
for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
pixels[pixel_ptr++] =
colors[((pixel_y & 0x2) << 1) +
(pixel_x & 0x2) + ((flags & 0x1) ^ 1)];
pixel_ptr -= row_dec;
}
} else {
/* 1-color encoding */
colors[0] = byte_a;
for (pixel_y = 0; pixel_y < 4; pixel_y++) {
for (pixel_x = 0; pixel_x < 4; pixel_x++)
pixels[pixel_ptr++] = colors[0];
pixel_ptr -= row_dec;
}
}
block_ptr += block_inc;
total_blocks--;
}
}
/* make the palette available on the way out */
if (s->avctx->pix_fmt == PIX_FMT_PAL8)
memcpy(s->frame.data[1], s->palette, PALETTE_COUNT * 4);
}
static void msvideo1_decode_16bit(Msvideo1Context *s)
{
int block_ptr, pixel_ptr;
int total_blocks;
int pixel_x, pixel_y; /* pixel width and height iterators */
int block_x, block_y; /* block width and height iterators */
int blocks_wide, blocks_high; /* width and height in 4x4 blocks */
int block_inc;
int row_dec;
/* decoding parameters */
int stream_ptr;
unsigned char byte_a, byte_b;
unsigned short flags;
int skip_blocks;
unsigned short colors[8];
unsigned short *pixels = (unsigned short *)s->frame.data[0];
unsigned short *prev_pixels = (unsigned short *)s->prev_frame.data[0];
int stride = s->frame.linesize[0] / 2;
stream_ptr = 0;
skip_blocks = 0;
blocks_wide = s->avctx->width / 4;
blocks_high = s->avctx->height / 4;
total_blocks = blocks_wide * blocks_high;
block_inc = 4;
row_dec = stride + 4;
for (block_y = blocks_high; block_y > 0; block_y--) {
block_ptr = ((block_y * 4) - 1) * stride;
for (block_x = blocks_wide; block_x > 0; block_x--) {
/* check if this block should be skipped */
if (skip_blocks) {
COPY_PREV_BLOCK();
block_ptr += block_inc;
skip_blocks--;
total_blocks--;
continue;
}
pixel_ptr = block_ptr;
/* get the next two bytes in the encoded data stream */
CHECK_STREAM_PTR(2);
byte_a = s->buf[stream_ptr++];
byte_b = s->buf[stream_ptr++];
/* check if the decode is finished */
if ((byte_a == 0) && (byte_b == 0) && (total_blocks == 0)) {
return;
} else if ((byte_b & 0xFC) == 0x84) {
/* skip code, but don't count the current block */
skip_blocks = ((byte_b - 0x84) << 8) + byte_a - 1;
COPY_PREV_BLOCK();
} else if (byte_b < 0x80) {
/* 2- or 8-color encoding modes */
flags = (byte_b << 8) | byte_a;
CHECK_STREAM_PTR(4);
colors[0] = LE_16(&s->buf[stream_ptr]);
stream_ptr += 2;
colors[1] = LE_16(&s->buf[stream_ptr]);
stream_ptr += 2;
if (colors[0] & 0x8000) {
/* 8-color encoding */
CHECK_STREAM_PTR(12);
colors[2] = LE_16(&s->buf[stream_ptr]);
stream_ptr += 2;
colors[3] = LE_16(&s->buf[stream_ptr]);
stream_ptr += 2;
colors[4] = LE_16(&s->buf[stream_ptr]);
stream_ptr += 2;
colors[5] = LE_16(&s->buf[stream_ptr]);
stream_ptr += 2;
colors[6] = LE_16(&s->buf[stream_ptr]);
stream_ptr += 2;
colors[7] = LE_16(&s->buf[stream_ptr]);
stream_ptr += 2;
for (pixel_y = 0; pixel_y < 4; pixel_y++) {
for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
pixels[pixel_ptr++] =
colors[((pixel_y & 0x2) << 1) +
(pixel_x & 0x2) + ((flags & 0x1) ^ 1)];
pixel_ptr -= row_dec;
}
} else {
/* 2-color encoding */
for (pixel_y = 0; pixel_y < 4; pixel_y++) {
for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
pixels[pixel_ptr++] = colors[(flags & 0x1) ^ 1];
pixel_ptr -= row_dec;
}
}
} else {
/* otherwise, it's a 1-color block */
colors[0] = (byte_b << 8) | byte_a;
for (pixel_y = 0; pixel_y < 4; pixel_y++) {
for (pixel_x = 0; pixel_x < 4; pixel_x++)
pixels[pixel_ptr++] = colors[0];
pixel_ptr -= row_dec;
}
}
block_ptr += block_inc;
total_blocks--;
}
}
}
static int msvideo1_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
uint8_t *buf, int buf_size)
{
Msvideo1Context *s = (Msvideo1Context *)avctx->priv_data;
s->buf = buf;
s->size = buf_size;
if (avctx->get_buffer(avctx, &s->frame)) {
printf (" MS Video-1 Video: get_buffer() failed\n");
return -1;
}
if (s->mode_8bit)
msvideo1_decode_8bit(s);
else
msvideo1_decode_16bit(s);
if (s->prev_frame.data[0])
avctx->release_buffer(avctx, &s->prev_frame);
/* shuffle frames */
s->prev_frame = s->frame;
*data_size = sizeof(AVFrame);
*(AVFrame*)data = s->frame;
/* report that the buffer was completely consumed */
return buf_size;
}
static int msvideo1_decode_end(AVCodecContext *avctx)
{
Msvideo1Context *s = (Msvideo1Context *)avctx->priv_data;
if (s->prev_frame.data[0])
avctx->release_buffer(avctx, &s->prev_frame);
return 0;
}
AVCodec msvideo1_decoder = {
"msvideo1",
CODEC_TYPE_VIDEO,
CODEC_ID_MSVIDEO1,
sizeof(Msvideo1Context),
msvideo1_decode_init,
NULL,
msvideo1_decode_end,
msvideo1_decode_frame,
CODEC_CAP_DR1,
};

310
libavcodec/rpza.c Normal file
View File

@ -0,0 +1,310 @@
/*
* Quicktime Video (RPZA) Video Decoder
* Copyright (C) 2003 the ffmpeg project
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/**
* @file rpza.c
* QT RPZA Video Decoder by Roberto Togni <rtogni@bresciaonline.it>
* For more information about the RPZA format, visit:
* http://www.pcisys.net/~melanson/codecs/
*
* The RPZA decoder outputs RGB555 colorspace data.
*
* Note that this decoder reads big endian RGB555 pixel values from the
* bytestream, arranges them in the host's endian order, and outputs
* them to the final rendered map in the same host endian order. This is
* intended behavior as the ffmpeg documentation states that RGB555 pixels
* shall be stored in native CPU endianness.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "common.h"
#include "avcodec.h"
#include "dsputil.h"
typedef struct RpzaContext {
AVCodecContext *avctx;
DSPContext dsp;
AVFrame frame;
AVFrame prev_frame;
unsigned char *buf;
int size;
} RpzaContext;
#define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
#define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
(((uint8_t*)(x))[1] << 16) | \
(((uint8_t*)(x))[2] << 8) | \
((uint8_t*)(x))[3])
#define ADVANCE_BLOCK() \
{ \
pixel_ptr += 4; \
if (pixel_ptr >= width) \
{ \
pixel_ptr = 0; \
row_ptr += stride * 4; \
} \
total_blocks--; \
if (total_blocks < 0) \
{ \
printf("warning: block counter just went negative (this should not happen)\n"); \
return; \
} \
}
static void rpza_decode_stream(RpzaContext *s)
{
int width = s->avctx->width;
int stride = s->frame.linesize[0] / 2;
int row_inc = stride - 4;
int stream_ptr = 0;
int chunk_size;
unsigned char opcode;
int n_blocks;
unsigned short colorA = 0, colorB;
unsigned short color4[4];
unsigned char index, idx;
unsigned short ta, tb;
unsigned short *pixels = (unsigned short *)s->frame.data[0];
unsigned short *prev_pixels = (unsigned short *)s->prev_frame.data[0];
int row_ptr = 0;
int pixel_ptr = 0;
int block_ptr;
int pixel_x, pixel_y;
int total_blocks;
/* First byte is always 0xe1. Warn if it's different */
if (s->buf[stream_ptr] != 0xe1)
printf("First chunk byte is 0x%02x instead of 0x1e\n",
s->buf[stream_ptr]);
/* Get chunk size, ingnoring first byte */
chunk_size = BE_32(&s->buf[stream_ptr]) & 0x00FFFFFF;
stream_ptr += 4;
/* If length mismatch use size from MOV file and try to decode anyway */
if (chunk_size != s->size)
printf("MOV chunk size != encoded chunk size; using MOV chunk size\n");
chunk_size = s->size;
/* Number of 4x4 blocks in frame. */
total_blocks = (s->avctx->width * s->avctx->height) / (4 * 4);
/* Process chunk data */
while (stream_ptr < chunk_size) {
opcode = s->buf[stream_ptr++]; /* Get opcode */
n_blocks = (opcode & 0x1f) + 1; /* Extract block counter from opcode */
/* If opcode MSbit is 0, we need more data to decide what to do */
if ((opcode & 0x80) == 0) {
colorA = (opcode << 8) | (s->buf[stream_ptr++]);
opcode = 0;
if ((s->buf[stream_ptr] & 0x80) != 0) {
/* Must behave as opcode 110xxxxx, using colorA computed
* above. Use fake opcode 0x20 to enter switch block at
* the right place */
opcode = 0x20;
n_blocks = 1;
}
}
switch (opcode & 0xe0) {
/* Skip blocks */
case 0x80:
while (n_blocks--) {
block_ptr = row_ptr + pixel_ptr;
for (pixel_y = 0; pixel_y < 4; pixel_y++) {
for (pixel_x = 0; pixel_x < 4; pixel_x++){
pixels[block_ptr] = prev_pixels[block_ptr];
block_ptr++;
}
block_ptr += row_inc;
}
ADVANCE_BLOCK();
}
break;
/* Fill blocks with one color */
case 0xa0:
colorA = BE_16 (&s->buf[stream_ptr]);
stream_ptr += 2;
while (n_blocks--) {
block_ptr = row_ptr + pixel_ptr;
for (pixel_y = 0; pixel_y < 4; pixel_y++) {
for (pixel_x = 0; pixel_x < 4; pixel_x++){
pixels[block_ptr] = colorA;
block_ptr++;
}
block_ptr += row_inc;
}
ADVANCE_BLOCK();
}
break;
/* Fill blocks with 4 colors */
case 0xc0:
colorA = BE_16 (&s->buf[stream_ptr]);
stream_ptr += 2;
case 0x20:
colorB = BE_16 (&s->buf[stream_ptr]);
stream_ptr += 2;
/* sort out the colors */
color4[0] = colorB;
color4[1] = 0;
color4[2] = 0;
color4[3] = colorA;
/* red components */
ta = (colorA >> 10) & 0x1F;
tb = (colorB >> 10) & 0x1F;
color4[1] |= ((11 * ta + 21 * tb) >> 5) << 10;
color4[2] |= ((21 * ta + 11 * tb) >> 5) << 10;
/* green components */
ta = (colorA >> 5) & 0x1F;
tb = (colorB >> 5) & 0x1F;
color4[1] |= ((11 * ta + 21 * tb) >> 5) << 5;
color4[2] |= ((21 * ta + 11 * tb) >> 5) << 5;
/* blue components */
ta = colorA & 0x1F;
tb = colorB & 0x1F;
color4[1] |= ((11 * ta + 21 * tb) >> 5);
color4[2] |= ((21 * ta + 11 * tb) >> 5);
while (n_blocks--) {
block_ptr = row_ptr + pixel_ptr;
for (pixel_y = 0; pixel_y < 4; pixel_y++) {
index = s->buf[stream_ptr++];
for (pixel_x = 0; pixel_x < 4; pixel_x++){
idx = (index >> (2 * (3 - pixel_x))) & 0x03;
pixels[block_ptr] = color4[idx];
block_ptr++;
}
block_ptr += row_inc;
}
ADVANCE_BLOCK();
}
break;
/* Fill block with 16 colors */
case 0x00:
block_ptr = row_ptr + pixel_ptr;
for (pixel_y = 0; pixel_y < 4; pixel_y++) {
for (pixel_x = 0; pixel_x < 4; pixel_x++){
/* We already have color of upper left pixel */
if ((pixel_y != 0) || (pixel_x !=0)) {
colorA = BE_16 (&s->buf[stream_ptr]);
stream_ptr += 2;
}
pixels[block_ptr] = colorA;
block_ptr++;
}
block_ptr += row_inc;
}
ADVANCE_BLOCK();
break;
/* Unknown opcode */
default:
printf("Unknown opcode %d in rpza chunk."
" Skip remaining %d bytes of chunk data.\n", opcode,
chunk_size - stream_ptr);
return;
} /* Opcode switch */
}
}
static int rpza_decode_init(AVCodecContext *avctx)
{
RpzaContext *s = (RpzaContext *)avctx->priv_data;
s->avctx = avctx;
avctx->pix_fmt = PIX_FMT_RGB555;
avctx->has_b_frames = 0;
dsputil_init(&s->dsp, avctx);
s->frame.data[0] = s->prev_frame.data[0] = NULL;
return 0;
}
static int rpza_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
uint8_t *buf, int buf_size)
{
RpzaContext *s = (RpzaContext *)avctx->priv_data;
s->buf = buf;
s->size = buf_size;
if (avctx->get_buffer(avctx, &s->frame)) {
printf (" RPZA Video: get_buffer() failed\n");
return -1;
}
rpza_decode_stream(s);
if (s->prev_frame.data[0])
avctx->release_buffer(avctx, &s->prev_frame);
/* shuffle frames */
s->prev_frame = s->frame;
*data_size = sizeof(AVFrame);
*(AVFrame*)data = s->frame;
/* always report that the buffer was completely consumed */
return buf_size;
}
static int rpza_decode_end(AVCodecContext *avctx)
{
RpzaContext *s = (RpzaContext *)avctx->priv_data;
if (s->prev_frame.data[0])
avctx->release_buffer(avctx, &s->prev_frame);
return 0;
}
AVCodec rpza_decoder = {
"rpza",
CODEC_TYPE_VIDEO,
CODEC_ID_RPZA,
sizeof(RpzaContext),
rpza_decode_init,
NULL,
rpza_decode_end,
rpza_decode_frame,
CODEC_CAP_DR1,
};

2
libavformat/Makefile
View File

@ -15,7 +15,7 @@ PPOBJS=
OBJS+=mpeg.o mpegts.o mpegtsenc.o ffm.o crc.o img.o raw.o rm.o \
avienc.o avidec.o wav.o swf.o au.o gif.o mov.o mpjpeg.o dv.o \
yuv4mpeg.o 4xm.o flvenc.o flvdec.o movenc.o psxstr.o idroq.o ipmovie.o \
nut.o wc3movie.o mp3.o
nut.o wc3movie.o mp3.o westwood.o segafilm.o
ifeq ($(CONFIG_RISKY),yes)
OBJS+= asf.o

2
libavformat/allformats.c
View File

@ -56,6 +56,8 @@ void av_register_all(void)
roq_init();
ipmovie_init();
wc3_init();
westwood_init();
film_init();
#if defined(AMR_NB) || defined(AMR_NB_FIXED) || defined(AMR_WB)
amr_init();

6
libavformat/avformat.h
View File

@ -406,6 +406,12 @@ int nut_init(void);
/* wc3movie.c */
int wc3_init(void);
/* westwood.c */
int westwood_init(void);
/* segafilm.c */
int film_init(void);
#include "rtp.h"
#include "rtsp.h"

9
libavformat/avienc.c
View File

@ -141,6 +141,15 @@ const CodecTag codec_bmp_tags[] = {
{ CODEC_ID_VCR1, MKTAG('V', 'C', 'R', '1') },
{ CODEC_ID_FFV1, MKTAG('F', 'F', 'V', '1') },
{ CODEC_ID_XAN_WC4, MKTAG('X', 'x', 'a', 'n') },
{ CODEC_ID_MSRLE, MKTAG('m', 'r', 'l', 'e') },
{ CODEC_ID_MSRLE, MKTAG(0x1, 0x0, 0x0, 0x0) },
{ CODEC_ID_MSVIDEO1, MKTAG('M', 'S', 'V', 'C') },
{ CODEC_ID_MSVIDEO1, MKTAG('m', 's', 'v', 'c') },
{ CODEC_ID_MSVIDEO1, MKTAG('C', 'R', 'A', 'M') },
{ CODEC_ID_MSVIDEO1, MKTAG('c', 'r', 'a', 'm') },
{ CODEC_ID_MSVIDEO1, MKTAG('W', 'H', 'A', 'M') },
{ CODEC_ID_MSVIDEO1, MKTAG('w', 'h', 'a', 'm') },
{ CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') },
{ 0, 0 },
};

2
libavformat/mov.c
View File

@ -98,6 +98,8 @@ static const CodecTag mov_video_tags[] = {
{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', 'p') }, /* DV PAL */
/* { CODEC_ID_DVVIDEO, MKTAG('A', 'V', 'd', 'v') }, *//* AVID dv */
{ CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') }, /* On2 VP3 */
{ CODEC_ID_RPZA, MKTAG('r', 'p', 'z', 'a') }, /* Apple Video (RPZA) */
{ CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') }, /* Cinepak */
{ CODEC_ID_NONE, 0 },
};

323
libavformat/segafilm.c Normal file
View File

@ -0,0 +1,323 @@
/*
* Sega FILM Format (CPK) Demuxer
* Copyright (c) 2003 The ffmpeg Project
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/**
* @file segafilm.c
* Sega FILM (.cpk) file demuxer
* by Mike Melanson (melanson@pcisys.net)
* For more information regarding the Sega FILM file format, visit:
* http://www.pcisys.net/~melanson/codecs/
*/
#include "avformat.h"
#define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
#define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
(((uint8_t*)(x))[1] << 16) | \
(((uint8_t*)(x))[2] << 8) | \
((uint8_t*)(x))[3])
#define FOURCC_TAG( ch0, ch1, ch2, ch3 ) \
( (long)(unsigned char)(ch3) | \
( (long)(unsigned char)(ch2) << 8 ) | \
( (long)(unsigned char)(ch1) << 16 ) | \
( (long)(unsigned char)(ch0) << 24 ) )
#define FILM_TAG FOURCC_TAG('F', 'I', 'L', 'M')
#define FDSC_TAG FOURCC_TAG('F', 'D', 'S', 'C')
#define STAB_TAG FOURCC_TAG('S', 'T', 'A', 'B')
#define CVID_TAG FOURCC_TAG('c', 'v', 'i', 'd')
typedef struct {
int stream;
off_t sample_offset;
unsigned int sample_size;
int64_t pts;
int keyframe;
} film_sample_t;
typedef struct FilmDemuxContext {
int video_stream_index;
int audio_stream_index;
unsigned int audio_type;
unsigned int audio_samplerate;
unsigned int audio_bits;
unsigned int audio_channels;
unsigned int video_type;
unsigned int sample_count;
film_sample_t *sample_table;
unsigned int current_sample;
unsigned int base_clock;
unsigned int version;
int cvid_extra_bytes; /* the number of bytes thrown into the Cinepak
* chunk header to throw off decoders */
/* buffer used for interleaving stereo PCM data */
unsigned char *stereo_buffer;
int stereo_buffer_size;
} FilmDemuxContext;
static int film_probe(AVProbeData *p)
{
if (p->buf_size < 4)
return 0;
if (BE_32(&p->buf[0]) != FILM_TAG)
return 0;
return AVPROBE_SCORE_MAX;
}
static int film_read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
FilmDemuxContext *film = (FilmDemuxContext *)s->priv_data;
ByteIOContext *pb = &s->pb;
AVStream *st;
unsigned char scratch[256];
int i;
unsigned int data_offset;
unsigned int audio_frame_counter;
film->sample_table = NULL;
film->stereo_buffer = NULL;
film->stereo_buffer_size = 0;
/* load the main FILM header */
if (get_buffer(pb, scratch, 16) != 16)
return -EIO;
data_offset = BE_32(&scratch[4]);
film->version = BE_32(&scratch[8]);
/* load the FDSC chunk */
if (film->version == 0) {
/* special case for Lemmings .film files; 20-byte header */
if (get_buffer(pb, scratch, 20) != 20)
return -EIO;
/* make some assumptions about the audio parameters */
film->audio_type = CODEC_ID_PCM_S8;
film->audio_samplerate = 22050;
film->audio_channels = 1;
film->audio_bits = 8;
} else {
/* normal Saturn .cpk files; 32-byte header */
if (get_buffer(pb, scratch, 32) != 32)
return -EIO;
film->audio_samplerate = BE_16(&scratch[24]);;
film->audio_channels = scratch[21];
film->audio_bits = scratch[22];
if (film->audio_bits == 8)
film->audio_type = CODEC_ID_PCM_S8;
else if (film->audio_bits == 16)
film->audio_type = CODEC_ID_PCM_S16BE;
else
film->audio_type = 0;
}
if (BE_32(&scratch[0]) != FDSC_TAG)
return AVERROR_INVALIDDATA;
film->cvid_extra_bytes = 0;
if (BE_32(&scratch[8]) == CVID_TAG) {
film->video_type = CODEC_ID_CINEPAK;
if (film->version)
film->cvid_extra_bytes = 2;
else
film->cvid_extra_bytes = 6; /* Lemmings 3DO case */
} else
film->video_type = 0;
/* initialize the decoder streams */
if (film->video_type) {
st = av_new_stream(s, 0);
if (!st)
return AVERROR_NOMEM;
film->video_stream_index = st->index;
st->codec.codec_type = CODEC_TYPE_VIDEO;
st->codec.codec_id = film->video_type;
st->codec.codec_tag = 0; /* no fourcc */
st->codec.width = BE_32(&scratch[16]);
st->codec.height = BE_32(&scratch[12]);
}
if (film->audio_type) {
st = av_new_stream(s, 0);
if (!st)
return AVERROR_NOMEM;
film->audio_stream_index = st->index;
st->codec.codec_type = CODEC_TYPE_AUDIO;
st->codec.codec_id = film->audio_type;
st->codec.codec_tag = 1;
st->codec.channels = film->audio_channels;
st->codec.bits_per_sample = film->audio_bits;
st->codec.sample_rate = film->audio_samplerate;
st->codec.bit_rate = st->codec.channels * st->codec.sample_rate *
st->codec.bits_per_sample;
st->codec.block_align = st->codec.channels *
st->codec.bits_per_sample / 8;
}
/* load the sample table */
if (get_buffer(pb, scratch, 16) != 16)
return -EIO;
if (BE_32(&scratch[0]) != STAB_TAG)
return AVERROR_INVALIDDATA;
film->base_clock = BE_32(&scratch[8]);
film->sample_count = BE_32(&scratch[12]);
film->sample_table = av_malloc(film->sample_count * sizeof(film_sample_t));
audio_frame_counter = 0;
for (i = 0; i < film->sample_count; i++) {
/* load the next sample record and transfer it to an internal struct */
if (get_buffer(pb, scratch, 16) != 16) {
av_free(film->sample_table);
return -EIO;
}
film->sample_table[i].sample_offset =
data_offset + BE_32(&scratch[0]);
film->sample_table[i].sample_size = BE_32(&scratch[4]);
if (BE_32(&scratch[8]) == 0xFFFFFFFF) {
film->sample_table[i].stream = film->audio_stream_index;
film->sample_table[i].pts = audio_frame_counter;
film->sample_table[i].pts *= film->base_clock;
film->sample_table[i].pts /= film->audio_samplerate;
audio_frame_counter += (film->sample_table[i].sample_size /
(film->audio_channels * film->audio_bits / 8));
} else {
film->sample_table[i].stream = film->video_stream_index;
film->sample_table[i].pts = BE_32(&scratch[8]) & 0x7FFFFFFF;
film->sample_table[i].keyframe = (scratch[8] & 0x80) ? 0 : 1;
}
}
film->current_sample = 0;
/* set the pts reference to match the tick rate of the file */
s->pts_num = 1;
s->pts_den = film->base_clock;
return 0;
}
static int film_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
FilmDemuxContext *film = (FilmDemuxContext *)s->priv_data;
ByteIOContext *pb = &s->pb;
film_sample_t *sample;
int ret = 0;
int i;
int left, right;
if (film->current_sample >= film->sample_count)
return -EIO;
sample = &film->sample_table[film->current_sample];
/* position the stream (will probably be there anyway) */
url_fseek(pb, sample->sample_offset, SEEK_SET);
/* do a special song and dance when loading FILM Cinepak chunks */
if ((sample->stream == film->video_stream_index) &&
(film->video_type == CODEC_ID_CINEPAK)) {
if (av_new_packet(pkt, sample->sample_size - film->cvid_extra_bytes))
return AVERROR_NOMEM;
ret = get_buffer(pb, pkt->data, 10);
/* skip the non-spec CVID bytes */
url_fseek(pb, film->cvid_extra_bytes, SEEK_CUR);
ret += get_buffer(pb, pkt->data + 10,
sample->sample_size - 10 - film->cvid_extra_bytes);
if (ret != sample->sample_size - film->cvid_extra_bytes)
ret = -EIO;
} else if ((sample->stream == film->audio_stream_index) &&
(film->audio_channels == 2)) {
/* stereo PCM needs to be interleaved */
if (av_new_packet(pkt, sample->sample_size))
return AVERROR_NOMEM;
/* make sure the interleave buffer is large enough */
if (sample->sample_size > film->stereo_buffer_size) {
av_free(film->stereo_buffer);
film->stereo_buffer_size = sample->sample_size;
film->stereo_buffer = av_malloc(film->stereo_buffer_size);
}
ret = get_buffer(pb, film->stereo_buffer, sample->sample_size);
if (ret != sample->sample_size)
ret = -EIO;
left = 0;
right = sample->sample_size / 2;
for (i = 0; i < sample->sample_size; ) {
if (film->audio_bits == 8) {
pkt->data[i++] = film->stereo_buffer[left++];
pkt->data[i++] = film->stereo_buffer[right++];
} else {
pkt->data[i++] = film->stereo_buffer[left++];
pkt->data[i++] = film->stereo_buffer[left++];
pkt->data[i++] = film->stereo_buffer[right++];
pkt->data[i++] = film->stereo_buffer[right++];
}
}
} else {
if (av_new_packet(pkt, sample->sample_size))
return AVERROR_NOMEM;
ret = get_buffer(pb, pkt->data, sample->sample_size);
if (ret != sample->sample_size)
ret = -EIO;
}
pkt->stream_index = sample->stream;
pkt->pts = sample->pts;
film->current_sample++;
return ret;
}
static int film_read_close(AVFormatContext *s)
{
FilmDemuxContext *film = (FilmDemuxContext *)s->priv_data;
av_free(film->sample_table);
av_free(film->stereo_buffer);
return 0;
}
static AVInputFormat film_iformat = {
"film_cpk",
"Sega FILM/CPK format",
sizeof(FilmDemuxContext),
film_probe,
film_read_header,
film_read_packet,
film_read_close,
};
int film_init(void)
{
av_register_input_format(&film_iformat);
return 0;
}

375
libavformat/westwood.c Normal file
View File

@ -0,0 +1,375 @@
/*
* Westwood Studios Multimedia Formats Demuxer (VQA, AUD)
* Copyright (c) 2003 The ffmpeg Project
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/**
* @file westwood.c
* 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 "avformat.h"
#define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
#define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
(((uint8_t*)(x))[2] << 16) | \
(((uint8_t*)(x))[1] << 8) | \
((uint8_t*)(x))[0])
#define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
(((uint8_t*)(x))[1] << 16) | \
(((uint8_t*)(x))[2] << 8) | \
((uint8_t*)(x))[3])
#define AUD_HEADER_SIZE 12
#define AUD_CHUNK_PREAMBLE_SIZE 8
#define AUD_CHUNK_SIGNATURE 0x0000DEAF
#define FOURCC_TAG( ch0, ch1, ch2, ch3 ) \
( (long)(unsigned char)(ch3) | \
( (long)(unsigned char)(ch2) << 8 ) | \
( (long)(unsigned char)(ch1) << 16 ) | \
( (long)(unsigned char)(ch0) << 24 ) )
#define FORM_TAG FOURCC_TAG('F', 'O', 'R', 'M')
#define WVQA_TAG FOURCC_TAG('W', 'V', 'Q', 'A')
#define VQHD_TAG FOURCC_TAG('V', 'Q', 'H', 'D')
#define FINF_TAG FOURCC_TAG('F', 'I', 'N', 'F')
#define SND0_TAG FOURCC_TAG('S', 'N', 'D', '0')
#define SND2_TAG FOURCC_TAG('S', 'N', 'D', '2')
#define VQFR_TAG FOURCC_TAG('V', 'Q', 'F', 'R')
#define VQA_HEADER_SIZE 0x2A
#define VQA_FRAMERATE 15
#define VQA_VIDEO_PTS_INC (90000 / VQA_FRAMERATE)
#define VQA_PREAMBLE_SIZE 8
typedef struct WsAudDemuxContext {
int audio_samplerate;
int audio_channels;
int audio_bits;
int 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;
int64_t video_pts;
} 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
* compression type (8 bits) = 1 or 99 ==> 2 acceptable numbers
* There is a total of 24 bits. The number space contains 2^24 =
* 16777216 numbers. There are 40001 * 2 = 80002 acceptable combinations
* of numbers. There is a 80002/16777216 = 0.48% chance of a false
* positive.
*/
if (p->buf_size < AUD_HEADER_SIZE)
return 0;
/* check sample rate */
field = LE_16(&p->buf[0]);
if ((field < 8000) || (field > 48000))
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;
/* 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 = (WsAudDemuxContext *)s->priv_data;
ByteIOContext *pb = &s->pb;
AVStream *st;
unsigned char header[AUD_HEADER_SIZE];
if (get_buffer(pb, header, AUD_HEADER_SIZE) != AUD_HEADER_SIZE)
return -EIO;
wsaud->audio_samplerate = LE_16(&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;
/* set the pts reference the same as the sample rate */
s->pts_num = 1;
s->pts_den = wsaud->audio_samplerate;
/* initialize the audio decoder stream */
st = av_new_stream(s, 0);
if (!st)
return AVERROR_NOMEM;
st->codec.codec_type = CODEC_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_sample = wsaud->audio_bits;
st->codec.bit_rate = st->codec.channels * st->codec.sample_rate *
st->codec.bits_per_sample / 4;
st->codec.block_align = st->codec.channels * st->codec.bits_per_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 = (WsAudDemuxContext *)s->priv_data;
ByteIOContext *pb = &s->pb;
unsigned char preamble[AUD_CHUNK_PREAMBLE_SIZE];
unsigned int chunk_size;
int ret = 0;
if (get_buffer(pb, preamble, AUD_CHUNK_PREAMBLE_SIZE) !=
AUD_CHUNK_PREAMBLE_SIZE)
return -EIO;
/* validate the chunk */
if (LE_32(&preamble[4]) != AUD_CHUNK_SIGNATURE)
return AVERROR_INVALIDDATA;
chunk_size = LE_16(&preamble[0]);
if (av_new_packet(pkt, chunk_size))
return -EIO;
pkt->stream_index = wsaud->audio_stream_index;
pkt->pts = wsaud->audio_frame_counter;
pkt->pts /= wsaud->audio_samplerate;
if ((ret = get_buffer(pb, pkt->data, chunk_size)) != chunk_size) {
av_free_packet(pkt);
ret = -EIO;
}
/* 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 wsaud_read_close(AVFormatContext *s)
{
// WsAudDemuxContext *wsaud = (WsAudDemuxContext *)s->priv_data;
return 0;
}
static int wsvqa_probe(AVProbeData *p)
{
/* need 12 bytes to qualify */
if (p->buf_size < 12)
return 0;
/* check for the VQA signatures */
if ((BE_32(&p->buf[0]) != FORM_TAG) ||
(BE_32(&p->buf[8]) != WVQA_TAG))
return 0;
return AVPROBE_SCORE_MAX;
}
static int wsvqa_read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
WsVqaDemuxContext *wsvqa = (WsVqaDemuxContext *)s->priv_data;
ByteIOContext *pb = &s->pb;
AVStream *st;
unsigned char *header;
unsigned char scratch[VQA_PREAMBLE_SIZE];
/* set the pts reference (1 pts = 1/90000) */
s->pts_num = 1;
s->pts_den = 90000;
/* initialize the video decoder stream */
st = av_new_stream(s, 0);
if (!st)
return AVERROR_NOMEM;
wsvqa->video_stream_index = st->index;
st->codec.codec_type = CODEC_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 */
url_fseek(pb, 20, SEEK_SET);
/* the VQA header needs to go to the decoder */
st->codec.extradata_size = VQA_HEADER_SIZE;
st->codec.extradata = av_malloc(VQA_HEADER_SIZE);
header = (unsigned char *)st->codec.extradata;
if (get_buffer(pb, st->codec.extradata, VQA_HEADER_SIZE) !=
VQA_HEADER_SIZE) {
av_free(st->codec.extradata);
return -EIO;
}
st->codec.width = LE_16(&header[6]);
st->codec.height = LE_16(&header[8]);
/* initialize the audio decoder stream */
st = av_new_stream(s, 0);
if (!st)
return AVERROR_NOMEM;
st->codec.codec_type = CODEC_TYPE_AUDIO;
st->codec.codec_id = CODEC_ID_ADPCM_IMA_WS;
st->codec.codec_tag = 0; /* no tag */
st->codec.sample_rate = LE_16(&header[24]);
st->codec.channels = header[26];
st->codec.bits_per_sample = 16;
st->codec.bit_rate = st->codec.channels * st->codec.sample_rate *
st->codec.bits_per_sample / 4;
st->codec.block_align = st->codec.channels * st->codec.bits_per_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;
/* skip the useless FINF chunk index */
if (get_buffer(pb, scratch, VQA_PREAMBLE_SIZE) != VQA_PREAMBLE_SIZE) {
av_free(st->codec.extradata);
return -EIO;
}
url_fseek(pb, BE_32(&scratch[4]), SEEK_CUR);
wsvqa->video_pts = wsvqa->audio_frame_counter = 0;
return 0;
}
static int wsvqa_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
WsVqaDemuxContext *wsvqa = (WsVqaDemuxContext *)s->priv_data;
ByteIOContext *pb = &s->pb;
int ret = 0;
unsigned char preamble[VQA_PREAMBLE_SIZE];
unsigned int chunk_type;
unsigned int chunk_size;
int skip_byte;
if (get_buffer(pb, preamble, VQA_PREAMBLE_SIZE) != VQA_PREAMBLE_SIZE)
return -EIO;
chunk_type = BE_32(&preamble[0]);
chunk_size = BE_32(&preamble[4]);
skip_byte = chunk_size & 0x01;
if ((chunk_type == SND2_TAG) || (chunk_type == VQFR_TAG)) {
if (av_new_packet(pkt, chunk_size))
return -EIO;
ret = get_buffer(pb, pkt->data, chunk_size);
if (ret != chunk_size) {
av_free_packet(pkt);
ret = -EIO;
}
if (chunk_type == SND2_TAG) {
pkt->stream_index = wsvqa->audio_stream_index;
pkt->pts = 90000;
pkt->pts *= wsvqa->audio_frame_counter;
pkt->pts /= wsvqa->audio_samplerate;
/* 2 samples/byte, 1 or 2 samples per frame depending on stereo */
wsvqa->audio_frame_counter += (chunk_size * 2) /
wsvqa->audio_channels;
} else {
pkt->stream_index = wsvqa->video_stream_index;
pkt->pts = wsvqa->video_pts;
wsvqa->video_pts += VQA_VIDEO_PTS_INC;
}
} else
return AVERROR_INVALIDDATA;
/* stay on 16-bit alignment */
if (skip_byte)
url_fseek(pb, 1, SEEK_CUR);
return ret;
}
static int wsvqa_read_close(AVFormatContext *s)
{
// WsVqaDemuxContext *wsvqa = (WsVqaDemuxContext *)s->priv_data;
return 0;
}
static AVInputFormat wsaud_iformat = {
"wsaud",
"Westwood Studios audio format",
sizeof(WsAudDemuxContext),
wsaud_probe,
wsaud_read_header,
wsaud_read_packet,
wsaud_read_close,
};
static AVInputFormat wsvqa_iformat = {
"wsvqa",
"Westwood Studios VQA format",
sizeof(WsVqaDemuxContext),
wsvqa_probe,
wsvqa_read_header,
wsvqa_read_packet,
wsvqa_read_close,
};
int westwood_init(void)
{
av_register_input_format(&wsaud_iformat);
av_register_input_format(&wsvqa_iformat);
return 0;
}