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PAF demuxer and decoder 

Signed-off-by: Paul B Mahol <onemda@gmail.com>
tags/n1.0
Paul B Mahol 13 years ago
parent
9b2b57681c
commit
7de4a16508
12 changed files with 754 additions and 2 deletions
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  1. +1
    -0
      Changelog
  2. +4
    -0
      doc/general.texi
  3. +2
    -0
      libavcodec/Makefile
  4. +2
    -0
      libavcodec/allcodecs.c
  5. +2
    -0
      libavcodec/avcodec.h
  6. +454
    -0
      libavcodec/paf.c
  7. +28
    -0
      libavcodec/paf.h
  8. +1
    -1
      libavcodec/version.h
  9. +1
    -0
      libavformat/Makefile
  10. +1
    -0
      libavformat/allformats.c
  11. +257
    -0
      libavformat/paf.c
  12. +1
    -1
      libavformat/version.h

+ 1
- 0
Changelog View File

@@ -19,6 +19,7 @@ version next:
- LucasArts SMUSH playback support
- SAMI demuxer and decoder
- RealText demuxer and decoder
- Heart Of Darkness PAF playback support


version 0.11:


+ 4
- 0
doc/general.texi View File

@@ -127,6 +127,8 @@ library:
@item American Laser Games MM @tab @tab X
@tab Multimedia format used in games like Mad Dog McCree.
@item 3GPP AMR @tab X @tab X
@item Amazing Studio Packed Animation File @tab @tab X
@tab Multimedia format used in game Heart Of Darkness.
@item Apple HTTP Live Streaming @tab @tab X
@item Artworx Data Format @tab @tab X
@item ASF @tab X @tab X
@@ -441,6 +443,7 @@ following image formats are supported:
@item 8SVX fibonacci @tab @tab X
@item A64 multicolor @tab X @tab
@tab Creates video suitable to be played on a commodore 64 (multicolor mode).
@item Amazing Studio PAF Video @tab @tab X
@item American Laser Games MM @tab @tab X
@tab Used in games like Mad Dog McCree.
@item AMV Video @tab X @tab X
@@ -735,6 +738,7 @@ following image formats are supported:
@tab encoding supported through external library libopencore-amrnb
@item AMR-WB @tab E @tab X
@tab encoding supported through external library libvo-amrwbenc
@item Amazing Studio PAF Audio @tab @tab X
@item Apple lossless audio @tab X @tab X
@tab QuickTime fourcc 'alac'
@item Atrac 1 @tab @tab X


+ 2
- 0
libavcodec/Makefile View File

@@ -337,6 +337,8 @@ OBJS-$(CONFIG_NELLYMOSER_DECODER) += nellymoserdec.o nellymoser.o
OBJS-$(CONFIG_NELLYMOSER_ENCODER) += nellymoserenc.o nellymoser.o \
audio_frame_queue.o
OBJS-$(CONFIG_NUV_DECODER) += nuv.o rtjpeg.o
OBJS-$(CONFIG_PAF_VIDEO_DECODER) += paf.o
OBJS-$(CONFIG_PAF_AUDIO_DECODER) += paf.o
OBJS-$(CONFIG_PAM_DECODER) += pnmdec.o pnm.o
OBJS-$(CONFIG_PAM_ENCODER) += pamenc.o pnm.o
OBJS-$(CONFIG_PBM_DECODER) += pnmdec.o pnm.o


+ 2
- 0
libavcodec/allcodecs.c View File

@@ -176,6 +176,7 @@ void avcodec_register_all(void)
REGISTER_DECODER (MSZH, mszh);
REGISTER_DECODER (MXPEG, mxpeg);
REGISTER_DECODER (NUV, nuv);
REGISTER_DECODER (PAF_VIDEO, paf_video);
REGISTER_ENCDEC (PAM, pam);
REGISTER_ENCDEC (PBM, pbm);
REGISTER_ENCDEC (PCX, pcx);
@@ -307,6 +308,7 @@ void avcodec_register_all(void)
REGISTER_DECODER (MPC7, mpc7);
REGISTER_DECODER (MPC8, mpc8);
REGISTER_ENCDEC (NELLYMOSER, nellymoser);
REGISTER_DECODER (PAF_AUDIO, paf_audio);
REGISTER_DECODER (QCELP, qcelp);
REGISTER_DECODER (QDM2, qdm2);
REGISTER_ENCDEC (RA_144, ra_144);


+ 2
- 0
libavcodec/avcodec.h View File

@@ -271,6 +271,7 @@ enum CodecID {
CODEC_ID_V408 = MKBETAG('V','4','0','8'),
CODEC_ID_YUV4 = MKBETAG('Y','U','V','4'),
CODEC_ID_SANM = MKBETAG('S','A','N','M'),
CODEC_ID_PAF_VIDEO = MKBETAG('P','A','F','V'),

/* various PCM "codecs" */
CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs
@@ -416,6 +417,7 @@ enum CodecID {
CODEC_ID_8SVX_RAW = MKBETAG('8','S','V','X'),
CODEC_ID_SONIC = MKBETAG('S','O','N','C'),
CODEC_ID_SONIC_LS = MKBETAG('S','O','N','L'),
CODEC_ID_PAF_AUDIO = MKBETAG('P','A','F','A'),

/* subtitle codecs */
CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs.


+ 454
- 0
libavcodec/paf.c View File

@@ -0,0 +1,454 @@
/*
* Packed Animation File video and audio decoder
* Copyright (c) 2012 Paul B Mahol
*
* 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
*/

#include "libavutil/intreadwrite.h"
#include "libavcodec/dsputil.h"
#include "libavcodec/paf.h"
#include "bytestream.h"
#include "avcodec.h"

static const uint8_t block_sequences[16][8] =
{
{ 0, 0, 0, 0, 0, 0, 0, 0 },
{ 2, 0, 0, 0, 0, 0, 0, 0 },
{ 5, 7, 0, 0, 0, 0, 0, 0 },
{ 5, 0, 0, 0, 0, 0, 0, 0 },
{ 6, 0, 0, 0, 0, 0, 0, 0 },
{ 5, 7, 5, 7, 0, 0, 0, 0 },
{ 5, 7, 5, 0, 0, 0, 0, 0 },
{ 5, 7, 6, 0, 0, 0, 0, 0 },
{ 5, 5, 0, 0, 0, 0, 0, 0 },
{ 3, 0, 0, 0, 0, 0, 0, 0 },
{ 6, 6, 0, 0, 0, 0, 0, 0 },
{ 2, 4, 0, 0, 0, 0, 0, 0 },
{ 2, 4, 5, 7, 0, 0, 0, 0 },
{ 2, 4, 5, 0, 0, 0, 0, 0 },
{ 2, 4, 6, 0, 0, 0, 0, 0 },
{ 2, 4, 5, 7, 5, 7, 0, 0 }
};

typedef struct PAFVideoDecContext {
AVFrame pic;
GetByteContext gb;

int current_frame;
uint8_t *frame[4];
int frame_size;
int video_size;

uint8_t *opcodes;
} PAFVideoDecContext;

static av_cold int paf_vid_init(AVCodecContext *avctx)
{
PAFVideoDecContext *c = avctx->priv_data;
int i;

if (avctx->height & 3 || avctx->width & 3) {
av_log(avctx, AV_LOG_ERROR, "width and height must be multiplies of 4\n");
return AVERROR_INVALIDDATA;
}

avctx->pix_fmt = PIX_FMT_PAL8;

avcodec_get_frame_defaults(&c->pic);
c->frame_size = FFALIGN(avctx->height, 256) * avctx->width;
c->video_size = avctx->height * avctx->width;
for (i = 0; i < 4; i++) {
c->frame[i] = av_mallocz(c->frame_size);
if (!c->frame[i])
return AVERROR(ENOMEM);
}

return 0;
}

static int get_video_page_offset(AVCodecContext *avctx, uint8_t a, uint8_t b)
{
int x, y;

x = b & 0x7F;
y = ((a & 0x3F) << 1) | (b >> 7 & 1);

return y * 2 * avctx->width + x * 2;
}

static void copy4h(AVCodecContext *avctx, uint8_t *dst)
{
PAFVideoDecContext *c = avctx->priv_data;
int i;

for (i = 0; i < 4; i++) {
bytestream2_get_buffer(&c->gb, dst, 4);
dst += avctx->width;
}
}

static void copy_color_mask(AVCodecContext *avctx, uint8_t mask, uint8_t *dst, uint8_t color)
{
int i;

for (i = 0; i < 4; i++) {
if ((mask >> 4) & (1 << (3 - i)))
dst[i] = color;
if ((mask & 15) & (1 << (3 - i)))
dst[avctx->width + i] = color;
}
}

static void copy_src_mask(AVCodecContext *avctx, uint8_t mask, uint8_t *dst, const uint8_t *src)
{
int i;

for (i = 0; i < 4; i++) {
if ((mask >> 4) & (1 << (3 - i)))
dst[i] = src[i];
if ((mask & 15) & (1 << (3 - i)))
dst[avctx->width + i] = src[avctx->width + i];
}
}

static int decode_0(AVCodecContext *avctx, uint8_t code, uint8_t *pkt)
{
PAFVideoDecContext *c = avctx->priv_data;
uint32_t opcode_size, offset;
uint8_t *dst, *dend, mask = 0, color = 0, a, b, p;
const uint8_t *src, *send, *opcodes;
int i, j, x = 0;

i = bytestream2_get_byte(&c->gb);
if (i) {
if (code & 0x10) {
int align;

align = bytestream2_tell(&c->gb) & 3;
if (align)
bytestream2_skip(&c->gb, 4 - align);
}
do {
a = bytestream2_get_byte(&c->gb);
b = bytestream2_get_byte(&c->gb);
p = (a & 0xC0) >> 6;
dst = c->frame[p] + get_video_page_offset(avctx, a, b);
dend = c->frame[p] + c->frame_size;
offset = (b & 0x7F) * 2;
j = bytestream2_get_le16(&c->gb) + offset;

do {
offset++;
if (dst + 3 * avctx->width + 4 > dend)
return AVERROR_INVALIDDATA;
copy4h(avctx, dst);
if ((offset & 0x3F) == 0)
dst += avctx->width * 3;
dst += 4;
} while (offset < j);
} while (--i);
}

dst = c->frame[c->current_frame];
do {
a = bytestream2_get_byte(&c->gb);
b = bytestream2_get_byte(&c->gb);
p = (a & 0xC0) >> 6;
src = c->frame[p] + get_video_page_offset(avctx, a, b);
send = c->frame[p] + c->frame_size;
if (src + 3 * avctx->width + 4 > send)
return AVERROR_INVALIDDATA;
copy_block4(dst, src, avctx->width, avctx->width, 4);
i++;
if ((i & 0x3F) == 0)
dst += avctx->width * 3;
dst += 4;
} while (i < c->video_size / 16);

opcode_size = bytestream2_get_le16(&c->gb);
bytestream2_skip(&c->gb, 2);

if (bytestream2_get_bytes_left(&c->gb) < opcode_size)
return AVERROR_INVALIDDATA;

opcodes = pkt + bytestream2_tell(&c->gb);
bytestream2_skipu(&c->gb, opcode_size);

dst = c->frame[c->current_frame];

for (i = 0; i < avctx->height; i += 4, dst += avctx->width * 3) {
for (j = 0; j < avctx->width; j += 4, dst += 4) {
int opcode, k = 0;

if (x > opcode_size)
return AVERROR_INVALIDDATA;
if (j & 4) {
opcode = opcodes[x] & 15;
x++;
} else {
opcode = opcodes[x] >> 4;
}

while (block_sequences[opcode][k]) {

offset = avctx->width * 2;
code = block_sequences[opcode][k++];

switch (code) {
case 2:
offset = 0;
case 3:
color = bytestream2_get_byte(&c->gb);
case 4:
mask = bytestream2_get_byte(&c->gb);
copy_color_mask(avctx, mask, dst + offset, color);
break;
case 5:
offset = 0;
case 6:
a = bytestream2_get_byte(&c->gb);
b = bytestream2_get_byte(&c->gb);
p = (a & 0xC0) >> 6;
src = c->frame[p] + get_video_page_offset(avctx, a, b);
send = c->frame[p] + c->frame_size;
case 7:
if (src + offset + avctx->width + 4 > send)
return AVERROR_INVALIDDATA;
mask = bytestream2_get_byte(&c->gb);
copy_src_mask(avctx, mask, dst + offset, src + offset);
break;
}
}
}
}

return 0;
}

static int paf_vid_decode(AVCodecContext *avctx, void *data,
int *data_size, AVPacket *pkt)
{
PAFVideoDecContext *c = avctx->priv_data;
uint8_t code, *dst, *src, *end;
int i, frame, ret;

if (c->pic.data[0])
avctx->release_buffer(avctx, &c->pic);

c->pic.reference = 0;
if ((ret = avctx->get_buffer(avctx, &c->pic)) < 0)
return ret;

bytestream2_init(&c->gb, pkt->data, pkt->size);

code = bytestream2_get_byte(&c->gb);
if (code & 0x20) {
for (i = 0; i < 4; i++)
memset(c->frame[i], 0, c->frame_size);

memset(c->pic.data[1], 0, AVPALETTE_SIZE);
c->current_frame = 0;
c->pic.key_frame = 1;
c->pic.pict_type = AV_PICTURE_TYPE_I;
} else {
c->pic.key_frame = 0;
c->pic.pict_type = AV_PICTURE_TYPE_P;
}

if (code & 0x40) {
uint32_t *out = (uint32_t *)c->pic.data[1];
int index, count;

index = bytestream2_get_byte(&c->gb);
count = bytestream2_get_byte(&c->gb) + 1;

if (index + count > AVPALETTE_SIZE)
return AVERROR_INVALIDDATA;
if (bytestream2_get_bytes_left(&c->gb) < 3 * AVPALETTE_SIZE)
return AVERROR_INVALIDDATA;

out += index;
for (i = 0; i < count; i++) {
unsigned r, g, b;

r = bytestream2_get_byteu(&c->gb);
r = r << 2 | r >> 4;
g = bytestream2_get_byteu(&c->gb);
g = g << 2 | g >> 4;
b = bytestream2_get_byteu(&c->gb);
b = b << 2 | b >> 4;
*out++ = 0xFFU << 24 | r << 16 | g << 8 | b;
}
c->pic.palette_has_changed = 1;
}

switch (code & 0x0F) {
case 0:
if ((ret = decode_0(avctx, code, pkt->data)) < 0)
return ret;
break;
case 1:
dst = c->frame[c->current_frame];
bytestream2_skip(&c->gb, 2);
if (bytestream2_get_bytes_left(&c->gb) < c->video_size)
return AVERROR_INVALIDDATA;
bytestream2_get_bufferu(&c->gb, dst, c->video_size);
break;
case 2:
frame = bytestream2_get_byte(&c->gb);
if (frame > 3)
return AVERROR_INVALIDDATA;
if (frame != c->current_frame)
memcpy(c->frame[c->current_frame], c->frame[frame], c->frame_size);
break;
case 4:
dst = c->frame[c->current_frame];
end = dst + c->video_size;

bytestream2_skip(&c->gb, 2);

while (dst < end) {
int8_t code;
int count;

if (bytestream2_get_bytes_left(&c->gb) < 2)
return AVERROR_INVALIDDATA;

code = bytestream2_get_byteu(&c->gb);
count = FFABS(code) + 1;

if (dst + count > end)
return AVERROR_INVALIDDATA;
if (code < 0)
memset(dst, bytestream2_get_byteu(&c->gb), count);
else
bytestream2_get_buffer(&c->gb, dst, count);
dst += count;
}
break;
default:
av_log_ask_for_sample(avctx, "unknown/invalid code\n");
return AVERROR_INVALIDDATA;
}

dst = c->pic.data[0];
src = c->frame[c->current_frame];
for (i = 0; i < avctx->height; i++) {
memcpy(dst, src, avctx->width);
dst += c->pic.linesize[0];
src += avctx->width;
}

c->current_frame = (c->current_frame + 1) & 3;

*data_size = sizeof(AVFrame);
*(AVFrame *)data = c->pic;

return pkt->size;
}

static av_cold int paf_vid_close(AVCodecContext *avctx)
{
PAFVideoDecContext *c = avctx->priv_data;
int i;

if (c->pic.data[0])
avctx->release_buffer(avctx, &c->pic);

for (i = 0; i < 4; i++)
av_freep(&c->frame[i]);

return 0;
}

typedef struct PAFAudioDecContext {
AVFrame frame;
} PAFAudioDecContext;

static av_cold int paf_aud_init(AVCodecContext *avctx)
{
PAFAudioDecContext *c = avctx->priv_data;

if (avctx->channels != 2) {
av_log(avctx, AV_LOG_ERROR, "invalid number of channels\n");
return AVERROR_INVALIDDATA;
}

avcodec_get_frame_defaults(&c->frame);
avctx->channel_layout = AV_CH_LAYOUT_STEREO;
avctx->coded_frame = &c->frame;
avctx->sample_fmt = AV_SAMPLE_FMT_S16;

return 0;
}

static int paf_aud_decode(AVCodecContext *avctx, void *data,
int *got_frame_ptr, AVPacket *pkt)
{
PAFAudioDecContext *c = avctx->priv_data;
uint8_t *buf = pkt->data;
int16_t *output_samples;
const uint8_t *t;
int frames, ret, i, j, k;

frames = pkt->size / PAF_SOUND_FRAME_SIZE;
if (frames < 1)
return AVERROR_INVALIDDATA;

c->frame.nb_samples = PAF_SOUND_SAMPLES * frames;
if ((ret = avctx->get_buffer(avctx, &c->frame)) < 0)
return ret;

output_samples = (int16_t *)c->frame.data[0];
for (i = 0; i < frames; i++) {
t = buf + 256 * sizeof(uint16_t);
for (j = 0; j < PAF_SOUND_SAMPLES; j++) {
for (k = 0; k < 2; k++) {
*output_samples++ = AV_RL16(buf + *t++ * 2);
}
}
buf += PAF_SOUND_FRAME_SIZE;
}

*got_frame_ptr = 1;
*(AVFrame *)data = c->frame;

return pkt->size;
}

AVCodec ff_paf_video_decoder = {
.name = "paf_video",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_PAF_VIDEO,
.priv_data_size = sizeof(PAFVideoDecContext),
.init = paf_vid_init,
.close = paf_vid_close,
.decode = paf_vid_decode,
.long_name = NULL_IF_CONFIG_SMALL("Amazing Studio Packed Animation File Video"),
};

AVCodec ff_paf_audio_decoder = {
.name = "paf_audio",
.type = AVMEDIA_TYPE_AUDIO,
.id = CODEC_ID_PAF_AUDIO,
.priv_data_size = sizeof(PAFAudioDecContext),
.init = paf_aud_init,
.decode = paf_aud_decode,
.capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("Amazing Studio Packed Animation File Audio"),
};

+ 28
- 0
libavcodec/paf.h View File

@@ -0,0 +1,28 @@
/*
* Packed Animation File decoder/demuxer common code
* Copyright (c) 2012 Paul B Mahol
*
* 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
*/

#ifndef AVCODEC_PAF_H
#define AVCODEC_PAF_H

#define PAF_SOUND_SAMPLES 2205
#define PAF_SOUND_FRAME_SIZE ((256 + PAF_SOUND_SAMPLES) * 2)

#endif /* AVCODEC_PAF_H */

+ 1
- 1
libavcodec/version.h View File

@@ -27,7 +27,7 @@
*/

#define LIBAVCODEC_VERSION_MAJOR 54
#define LIBAVCODEC_VERSION_MINOR 32
#define LIBAVCODEC_VERSION_MINOR 33
#define LIBAVCODEC_VERSION_MICRO 100

#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \


+ 1
- 0
libavformat/Makefile View File

@@ -209,6 +209,7 @@ OBJS-$(CONFIG_OGG_MUXER) += oggenc.o \
vorbiscomment.o
OBJS-$(CONFIG_OMA_DEMUXER) += omadec.o pcm.o oma.o
OBJS-$(CONFIG_OMA_MUXER) += omaenc.o rawenc.o oma.o id3v2enc.o
OBJS-$(CONFIG_PAF_DEMUXER) += paf.o
OBJS-$(CONFIG_PCM_ALAW_DEMUXER) += pcmdec.o pcm.o rawdec.o
OBJS-$(CONFIG_PCM_ALAW_MUXER) += pcmenc.o rawenc.o
OBJS-$(CONFIG_PCM_F32BE_DEMUXER) += pcmdec.o pcm.o rawdec.o


+ 1
- 0
libavformat/allformats.c View File

@@ -173,6 +173,7 @@ void av_register_all(void)
REGISTER_DEMUXER (NUV, nuv);
REGISTER_MUXDEMUX (OGG, ogg);
REGISTER_MUXDEMUX (OMA, oma);
REGISTER_DEMUXER (PAF, paf);
REGISTER_MUXDEMUX (PCM_ALAW, pcm_alaw);
REGISTER_MUXDEMUX (PCM_MULAW, pcm_mulaw);
REGISTER_MUXDEMUX (PCM_F64BE, pcm_f64be);


+ 257
- 0
libavformat/paf.c View File

@@ -0,0 +1,257 @@
/*
* Packed Animation File demuxer
* Copyright (c) 2012 Paul B Mahol
*
* 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
*/

#include "libavcodec/paf.h"
#include "avformat.h"
#include "internal.h"

#define MAGIC "Packed Animation File V1.0\n(c) 1992-96 Amazing Studio\x0a\x1a"

typedef struct {
uint32_t buffer_size;
uint32_t frame_blks;
uint32_t nb_frames;
uint32_t start_offset;
uint32_t preload_count;
uint32_t max_video_blks;
uint32_t max_audio_blks;

uint32_t current_frame;
uint32_t current_frame_count;
uint32_t current_frame_block;

uint32_t *blocks_count_table;
uint32_t *frames_offset_table;
uint32_t *blocks_offset_table;

uint8_t *video_frame;
int video_size;

uint8_t *audio_frame;
uint8_t *temp_audio_frame;
int audio_size;

int got_audio;
} PAFDemuxContext;

static int read_probe(AVProbeData *p)
{
if ((p->buf_size >= strlen(MAGIC)) &&
!memcmp(p->buf, MAGIC, strlen(MAGIC)))
return AVPROBE_SCORE_MAX;
return 0;
}

static int read_close(AVFormatContext *s)
{
PAFDemuxContext *p = s->priv_data;

av_freep(&p->blocks_count_table);
av_freep(&p->frames_offset_table);
av_freep(&p->blocks_offset_table);
av_freep(&p->video_frame);
av_freep(&p->audio_frame);
av_freep(&p->temp_audio_frame);

return 0;
}

static void read_table(AVFormatContext *s, uint32_t *table, uint32_t count)
{
int i;

for (i = 0; i < count; i++)
table[i] = avio_rl32(s->pb);

avio_skip(s->pb, 4 * (FFALIGN(count, 512) - count));
}

static int read_header(AVFormatContext *s)
{
PAFDemuxContext *p = s->priv_data;
AVIOContext *pb = s->pb;
AVStream *ast, *vst;
int ret = 0;

avio_skip(pb, 132);

vst = avformat_new_stream(s, 0);
if (!vst)
return AVERROR(ENOMEM);

vst->start_time = 0;
vst->nb_frames =
vst->duration =
p->nb_frames = avio_rl32(pb);
avio_skip(pb, 4);
vst->codec->width = avio_rl32(pb);
vst->codec->height = avio_rl32(pb);
avio_skip(pb, 4);
vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
vst->codec->codec_tag = 0;
vst->codec->codec_id = CODEC_ID_PAF_VIDEO;
avpriv_set_pts_info(vst, 64, 1, 10);

ast = avformat_new_stream(s, 0);
if (!ast)
return AVERROR(ENOMEM);

ast->start_time = 0;
ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
ast->codec->codec_tag = 0;
ast->codec->codec_id = CODEC_ID_PAF_AUDIO;
ast->codec->channels = 2;
ast->codec->sample_rate = 22050;
avpriv_set_pts_info(ast, 64, 1, 22050);

p->buffer_size = avio_rl32(pb);
p->preload_count = avio_rl32(pb);
p->frame_blks = avio_rl32(pb);
p->start_offset = avio_rl32(pb);
p->max_video_blks = avio_rl32(pb);
p->max_audio_blks = avio_rl32(pb);
if (p->buffer_size < 175 ||
p->max_audio_blks < 2 ||
p->max_video_blks < 1 ||
p->frame_blks < 1 ||
p->nb_frames < 1 ||
p->preload_count < 1 ||
p->buffer_size > 2048 ||
p->max_video_blks > 2048 ||
p->max_audio_blks > 2048 ||
p->nb_frames > INT_MAX / sizeof(uint32_t) ||
p->frame_blks > INT_MAX / sizeof(uint32_t))
return AVERROR_INVALIDDATA;

p->blocks_count_table = av_mallocz(p->nb_frames * sizeof(uint32_t));
p->frames_offset_table = av_mallocz(p->nb_frames * sizeof(uint32_t));
p->blocks_offset_table = av_mallocz(p->frame_blks * sizeof(uint32_t));

p->video_size = p->max_video_blks * p->buffer_size;
p->video_frame = av_mallocz(p->video_size);

p->audio_size = p->max_audio_blks * p->buffer_size;
p->audio_frame = av_mallocz(p->audio_size);
p->temp_audio_frame = av_mallocz(p->audio_size);

if (!p->blocks_count_table ||
!p->frames_offset_table ||
!p->blocks_offset_table ||
!p->video_frame ||
!p->audio_frame ||
!p->temp_audio_frame) {
ret = AVERROR(ENOMEM);
goto fail;
}

avio_seek(pb, p->buffer_size, SEEK_SET);

read_table(s, p->blocks_count_table, p->nb_frames);
read_table(s, p->frames_offset_table, p->nb_frames);
read_table(s, p->blocks_offset_table, p->frame_blks);

p->got_audio = 0;
p->current_frame = 0;
p->current_frame_block = 0;

avio_seek(pb, p->start_offset, SEEK_SET);

return 0;

fail:
read_close(s);

return ret;
}

static int read_packet(AVFormatContext *s, AVPacket *pkt)
{
PAFDemuxContext *p = s->priv_data;
AVIOContext *pb = s->pb;
uint32_t count, offset;
int size, i;

if (p->current_frame >= p->nb_frames)
return AVERROR_EOF;

if (url_feof(pb))
return AVERROR_EOF;

if (p->got_audio) {
if (av_new_packet(pkt, p->audio_size) < 0)
return AVERROR(ENOMEM);

memcpy(pkt->data, p->temp_audio_frame, p->audio_size);
pkt->duration = PAF_SOUND_SAMPLES * p->audio_size / PAF_SOUND_FRAME_SIZE;
pkt->flags |= AV_PKT_FLAG_KEY;
pkt->stream_index = 1;
p->got_audio = 0;
return pkt->size;
}

count = (p->current_frame == 0) ? p->preload_count : p->blocks_count_table[p->current_frame - 1];
for (i = 0; i < count; i++) {
if (p->current_frame_block >= p->frame_blks)
return AVERROR_INVALIDDATA;

offset = p->blocks_offset_table[p->current_frame_block] & ~(1 << 31);
if (p->blocks_offset_table[p->current_frame_block] & (1 << 31)) {
if (offset > p->audio_size - p->buffer_size)
return AVERROR_INVALIDDATA;

avio_read(pb, p->audio_frame + offset, p->buffer_size);
if (offset == (p->max_audio_blks - 2) * p->buffer_size) {
memcpy(p->temp_audio_frame, p->audio_frame, p->audio_size);
p->got_audio = 1;
}
} else {
if (offset > p->video_size - p->buffer_size)
return AVERROR_INVALIDDATA;

avio_read(pb, p->video_frame + offset, p->buffer_size);
}
p->current_frame_block++;
}

size = p->video_size - p->frames_offset_table[p->current_frame];
if (size < 0)
return AVERROR_INVALIDDATA;

if (av_new_packet(pkt, size) < 0)
return AVERROR(ENOMEM);

pkt->stream_index = 0;
pkt->duration = 1;
memcpy(pkt->data, p->video_frame + p->frames_offset_table[p->current_frame], size);
p->current_frame++;

return pkt->size;
}

AVInputFormat ff_paf_demuxer = {
.name = "paf",
.long_name = NULL_IF_CONFIG_SMALL("Amazing Studio Packed Animation File"),
.priv_data_size = sizeof(PAFDemuxContext),
.read_probe = read_probe,
.read_header = read_header,
.read_packet = read_packet,
.read_close = read_close,
};

+ 1
- 1
libavformat/version.h View File

@@ -30,7 +30,7 @@
#include "libavutil/avutil.h"

#define LIBAVFORMAT_VERSION_MAJOR 54
#define LIBAVFORMAT_VERSION_MINOR 14
#define LIBAVFORMAT_VERSION_MINOR 15
#define LIBAVFORMAT_VERSION_MICRO 100

#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \


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