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PAF demuxer and decoder 

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
tags/n2.3
Paul B Mahol Vittorio Giovara 11 years ago
parent
d37c96213a
commit
70daeacd6e
12 changed files with 746 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. +14
    -0
      libavcodec/codec_desc.c
  7. +450
    -0
      libavcodec/paf.c
  8. +1
    -1
      libavcodec/version.h
  9. +1
    -0
      libavformat/Makefile
  10. +1
    -0
      libavformat/allformats.c
  11. +267
    -0
      libavformat/paf.c
  12. +1
    -1
      libavformat/version.h

+ 1
- 0
Changelog View File

@@ -7,6 +7,7 @@ version <next>:
- replaygain data export
- Alias PIX image encoder and decoder
- BRender PIX image decoder
- Amazing Studio PAF playback support


version 10:


+ 4
- 0
doc/general.texi View File

@@ -179,6 +179,8 @@ 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 ASF @tab X @tab X
@item AVI @tab X @tab X
@@ -490,6 +492,7 @@ 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 @tab X
@@ -778,6 +781,7 @@ 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 ATRAC1 @tab @tab X


+ 2
- 0
libavcodec/Makefile View File

@@ -275,6 +275,8 @@ OBJS-$(CONFIG_MXPEG_DECODER) += mxpegdec.o
OBJS-$(CONFIG_NELLYMOSER_DECODER) += nellymoserdec.o nellymoser.o
OBJS-$(CONFIG_NELLYMOSER_ENCODER) += nellymoserenc.o nellymoser.o
OBJS-$(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
OBJS-$(CONFIG_PBM_DECODER) += pnmdec.o pnm.o


+ 2
- 0
libavcodec/allcodecs.c View File

@@ -200,6 +200,7 @@ void avcodec_register_all(void)
REGISTER_DECODER(MTS2, mts2);
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);
@@ -321,6 +322,7 @@ 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

@@ -286,6 +286,7 @@ enum AVCodecID {
AV_CODEC_ID_FIC,
AV_CODEC_ID_ALIAS_PIX,
AV_CODEC_ID_BRENDER_PIX,
AV_CODEC_ID_PAF_VIDEO,

/* various PCM "codecs" */
AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs
@@ -434,6 +435,7 @@ enum AVCodecID {
AV_CODEC_ID_COMFORT_NOISE,
AV_CODEC_ID_TAK,
AV_CODEC_ID_METASOUND,
AV_CODEC_ID_PAF_AUDIO,

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


+ 14
- 0
libavcodec/codec_desc.c View File

@@ -1092,6 +1092,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
.long_name = NULL_IF_CONFIG_SMALL("Mirillis FIC"),
.props = AV_CODEC_PROP_LOSSY,
},
{
.id = AV_CODEC_ID_PAF_VIDEO,
.type = AVMEDIA_TYPE_VIDEO,
.name = "paf_video",
.long_name = NULL_IF_CONFIG_SMALL("Amazing Studio Packed Animation File Video"),
.props = AV_CODEC_PROP_LOSSY,
},

/* image codecs */
{
@@ -2221,6 +2228,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
.long_name = NULL_IF_CONFIG_SMALL("Voxware MetaSound"),
.props = AV_CODEC_PROP_LOSSY,
},
{
.id = AV_CODEC_ID_PAF_AUDIO,
.type = AVMEDIA_TYPE_AUDIO,
.name = "paf_audio",
.long_name = NULL_IF_CONFIG_SMALL("Amazing Studio Packed Animation File Audio"),
.props = AV_CODEC_PROP_LOSSY,
},

/* subtitle codecs */
{


+ 450
- 0
libavcodec/paf.c View File

@@ -0,0 +1,450 @@
/*
* Packed Animation File video and audio decoder
* Copyright (c) 2012 Paul B Mahol
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/

#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"

#include "avcodec.h"
#include "bytestream.h"
#include "copy_block.h"
#include "internal.h"
#include "mathops.h"

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

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 width;
int height;

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

uint8_t *opcodes;
} PAFVideoDecContext;

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

av_frame_free(&c->pic);

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

return 0;
}

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

c->width = avctx->width;
c->height = avctx->height;

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

avctx->pix_fmt = AV_PIX_FMT_PAL8;

c->pic = av_frame_alloc();
if (!c->pic)
return AVERROR(ENOMEM);

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

return 0;
}

static void read4x4block(PAFVideoDecContext *c, uint8_t *dst, int width)
{
int i;

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

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

for (i = 0; i < 4; i++) {
if (mask & (1 << 7 - i))
dst[i] = color;
if (mask & (1 << 3 - i))
dst[width + i] = color;
}
}

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

for (i = 0; i < 4; i++) {
if (mask & (1 << 7 - i))
dst[i] = src[i];
if (mask & (1 << 3 - i))
dst[width + i] = src[width + i];
}
}

static void set_src_position(PAFVideoDecContext *c,
const uint8_t **p,
const uint8_t **pend)
{
int val = bytestream2_get_be16(&c->gb);
int page = val >> 14;
int x = (val & 0x7F);
int y = ((val >> 7) & 0x7F);

*p = c->frame[page] + x * 2 + y * 2 * c->width;
*pend = c->frame[page] + c->frame_size;
}

static int decode_0(PAFVideoDecContext *c, uint8_t *pkt, uint8_t code)
{
uint32_t opcode_size, offset;
uint8_t *dst, *dend, mask = 0, color = 0;
const uint8_t *src, *send, *opcodes;
int i, j, op = 0;

i = bytestream2_get_byte(&c->gb);
if (i) {
if (code & 0x10) {
int pos = bytestream2_tell(&c->gb) & 3;
if (pos)
bytestream2_skip(&c->gb, 4 - pos);
}
do {
int page, val, x, y;
val = bytestream2_get_be16(&c->gb);
page = val >> 14;
x = (val & 0x7F) * 2;
y = ((val >> 7) & 0x7F) * 2;
dst = c->frame[page] + x + y * c->width;
dend = c->frame[page] + c->frame_size;
offset = (x & 0x7F) * 2;
j = bytestream2_get_le16(&c->gb) + offset;
do {
offset++;
if (dst + 3 * c->width + 4 > dend)
return AVERROR_INVALIDDATA;
read4x4block(c, dst, c->width);
if ((offset & 0x3F) == 0)
dst += c->width * 3;
dst += 4;
} while (offset < j);
} while (--i);
}

dst = c->frame[c->current_frame];
dend = c->frame[c->current_frame] + c->frame_size;
do {
set_src_position(c, &src, &send);
if ((src + 3 * c->width + 4 > send) ||
(dst + 3 * c->width + 4 > dend))
return AVERROR_INVALIDDATA;
copy_block4(dst, src, c->width, c->width, 4);
i++;
if ((i & 0x3F) == 0)
dst += c->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 < c->height; i += 4, dst += c->width * 3)
for (j = 0; j < c->width; j += 4, dst += 4) {
int opcode, k = 0;
if (op > opcode_size)
return AVERROR_INVALIDDATA;
if (j & 4) {
opcode = opcodes[op] & 15;
op++;
} else {
opcode = opcodes[op] >> 4;
}

while (block_sequences[opcode][k]) {
offset = c->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(dst + offset, c->width, mask, color);
break;
case 5:
offset = 0;
case 6:
set_src_position(c, &src, &send);
case 7:
if (src + offset + c->width + 4 > send)
return AVERROR_INVALIDDATA;
mask = bytestream2_get_byte(&c->gb);
copy_src_mask(dst + offset, c->width, mask, src + offset);
break;
}
}
}

return 0;
}

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

if ((ret = ff_reget_buffer(avctx, c->pic)) < 0)
return ret;

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

code = bytestream2_get_byte(&c->gb);
if (code & 0x20) { // frame is keyframe
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) { // palette update
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 > 256)
return AVERROR_INVALIDDATA;
if (bytestream2_get_bytes_left(&c->gb) < 3 * count)
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:
/* Block-based motion compensation using 4x4 blocks with either
* horizontal or vertical vectors; might incorporate VQ as well. */
if ((ret = decode_0(c, pkt->data, code)) < 0)
return ret;
break;
case 1:
/* Uncompressed data. This mode specifies that (width * height) bytes
* should be copied directly from the encoded buffer into the output. */
dst = c->frame[c->current_frame];
// possibly chunk length data
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:
/* Copy reference frame: Consume the next byte in the stream as the
* reference frame (which should be 0, 1, 2, or 3, and should not be
* the same as the current frame number). */
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:
/* Run length encoding.*/
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:
avpriv_request_sample(avctx, "unknown/invalid code");
return AVERROR_INVALIDDATA;
}

av_image_copy_plane(c->pic->data[0], c->pic->linesize[0],
c->frame[c->current_frame], c->width,
c->width, c->height);

c->current_frame = (c->current_frame + 1) & 3;
if ((ret = av_frame_ref(data, c->pic)) < 0)
return ret;

*got_frame = 1;

return pkt->size;
}

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

avctx->channel_layout = AV_CH_LAYOUT_STEREO;
avctx->sample_fmt = AV_SAMPLE_FMT_S16;

return 0;
}

static int paf_audio_decode(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *pkt)
{
AVFrame *frame = data;
int16_t *output_samples;
const uint8_t *src = pkt->data;
int frames, ret, i, j;
int16_t cb[256];

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

frame->nb_samples = PAF_SOUND_SAMPLES * frames;
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
return ret;

output_samples = (int16_t *)frame->data[0];
// codebook of 256 16-bit samples and 8-bit indices to it
for (j = 0; j < frames; j++) {
for (i = 0; i < 256; i++)
cb[i] = sign_extend(AV_RL16(src + i * 2), 16);
src += 256 * 2;
// always 2 channels
for (i = 0; i < PAF_SOUND_SAMPLES * 2; i++)
*output_samples++ = cb[*src++];
}
*got_frame = 1;

return pkt->size;
}

#if CONFIG_PAF_VIDEO_DECODER
AVCodec ff_paf_video_decoder = {
.name = "paf_video",
.long_name = NULL_IF_CONFIG_SMALL("Amazing Studio Packed Animation File Video"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_PAF_VIDEO,
.priv_data_size = sizeof(PAFVideoDecContext),
.init = paf_video_init,
.close = paf_video_close,
.decode = paf_video_decode,
.capabilities = CODEC_CAP_DR1,
};
#endif

#if CONFIG_PAF_AUDIO_DECODER
AVCodec ff_paf_audio_decoder = {
.name = "paf_audio",
.long_name = NULL_IF_CONFIG_SMALL("Amazing Studio Packed Animation File Audio"),
.type = AVMEDIA_TYPE_AUDIO,
.id = AV_CODEC_ID_PAF_AUDIO,
.init = paf_audio_init,
.decode = paf_audio_decode,
.capabilities = CODEC_CAP_DR1,
};
#endif

+ 1
- 1
libavcodec/version.h View File

@@ -29,7 +29,7 @@
#include "libavutil/version.h"

#define LIBAVCODEC_VERSION_MAJOR 55
#define LIBAVCODEC_VERSION_MINOR 38
#define LIBAVCODEC_VERSION_MINOR 39
#define LIBAVCODEC_VERSION_MICRO 0

#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \


+ 1
- 0
libavformat/Makefile View File

@@ -226,6 +226,7 @@ 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-$(CONFIG_PCM_ALAW_DEMUXER) += pcmdec.o pcm.o
OBJS-$(CONFIG_PCM_ALAW_MUXER) += pcmenc.o rawenc.o
OBJS-$(CONFIG_PCM_F32BE_DEMUXER) += pcmdec.o pcm.o


+ 1
- 0
libavformat/allformats.c View File

@@ -176,6 +176,7 @@ 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);


+ 267
- 0
libavformat/paf.c View File

@@ -0,0 +1,267 @@
/*
* Packed Animation File demuxer
* Copyright (c) 2012 Paul B Mahol
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/

#include "libavutil/channel_layout.h"

#include "avformat.h"
#include "internal.h"

#define MAGIC "Packed Animation File V1.0\n(c) 1992-96 Amazing Studio\x0a\x1a"
#define PAF_SOUND_SAMPLES 2205
#define PAF_SOUND_FRAME_SIZE ((256 + PAF_SOUND_SAMPLES) * 2)

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 = AV_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 = AV_CODEC_ID_PAF_AUDIO;
ast->codec->channels = 2;
ast->codec->channel_layout = AV_CH_LAYOUT_STEREO;
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(*p->blocks_count_table));
p->frames_offset_table = av_mallocz(p->nb_frames *
sizeof(*p->frames_offset_table));
p->blocks_offset_table = av_mallocz(p->frame_blks *
sizeof(*p->blocks_offset_table));

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 || pb->eof_reached)
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] & ~(1U << 31);
if (p->blocks_offset_table[p->current_frame_block] & (1U << 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++;
}

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

size = p->video_size - p->frames_offset_table[p->current_frame];

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);
if (pkt->data[0] & 0x20)
pkt->flags |= AV_PKT_FLAG_KEY;
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/version.h"

#define LIBAVFORMAT_VERSION_MAJOR 55
#define LIBAVFORMAT_VERSION_MINOR 13
#define LIBAVFORMAT_VERSION_MINOR 14
#define LIBAVFORMAT_VERSION_MICRO 0

#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \


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