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HNM4/HNM4A demuxer & video decoder

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Signed-off-by: Diego Biurrun <diego@biurrun.de>
pull/45/head
David Kment 11 years ago committed by Diego Biurrun
parent ed1a11ed52
commit 9af7a8523a
12 changed files with 681 additions and 2 deletions
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  1. 1
      Changelog
  2. 3
      doc/general.texi
  3. 1
      libavcodec/Makefile
  4. 1
      libavcodec/allcodecs.c
  5. 1
      libavcodec/avcodec.h
  6. 7
      libavcodec/codec_desc.c
  7. 459
      libavcodec/hnm4video.c
  8. 2
      libavcodec/version.h
  9. 1
      libavformat/Makefile
  10. 1
      libavformat/allformats.c
  11. 204
      libavformat/hnm.c
  12. 2
      libavformat/version.h

1
Changelog
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@ -40,6 +40,7 @@ version 10:
- Opus in Ogg demuxing
- Enhanced Low Delay AAC (ER AAC ELD) decoding (no LD SBR support)
- F4V muxer
- HNM version 4 demuxer and video decoder
version 9:

3
doc/general.texi
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@ -194,6 +194,8 @@ library:
@item GXF @tab X @tab X
@tab General eXchange Format SMPTE 360M, used by Thomson Grass Valley
playout servers.
@item HNM @tab @tab X
@tab Only version 4 supported, used in some games from Cryo Interactive
@item id Quake II CIN video @tab @tab X
@item id RoQ @tab X @tab X
@tab Used in Quake III, Jedi Knight 2, other computer games.
@ -524,6 +526,7 @@ following image formats are supported:
@item H.263+ / H.263-1998 / H.263 version 2 @tab X @tab X
@item H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 @tab E @tab X
@tab encoding supported through external library libx264
@item HNM version 4 @tab @tab X
@item HuffYUV @tab X @tab X
@item HuffYUV FFmpeg variant @tab X @tab X
@item IBM Ultimotion @tab @tab X

1
libavcodec/Makefile
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@ -196,6 +196,7 @@ OBJS-$(CONFIG_H264_DECODER) += h264.o \
h264_loopfilter.o h264_direct.o \
cabac.o h264_sei.o h264_ps.o \
h264_refs.o h264_cavlc.o h264_cabac.o
OBJS-$(CONFIG_HNM4_VIDEO_DECODER) += hnm4video.o
OBJS-$(CONFIG_HUFFYUV_DECODER) += huffyuv.o huffyuvdec.o
OBJS-$(CONFIG_HUFFYUV_ENCODER) += huffyuv.o huffyuvenc.o
OBJS-$(CONFIG_IAC_DECODER) += imc.o

1
libavcodec/allcodecs.c
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@ -153,6 +153,7 @@ void avcodec_register_all(void)
REGISTER_DECODER(H263I, h263i);
REGISTER_ENCODER(H263P, h263p);
REGISTER_DECODER(H264, h264);
REGISTER_DECODER(HNM4_VIDEO, hnm4_video);
REGISTER_ENCDEC (HUFFYUV, huffyuv);
REGISTER_DECODER(IDCIN, idcin);
REGISTER_DECODER(IFF_BYTERUN1, iff_byterun1);

1
libavcodec/avcodec.h
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@ -274,6 +274,7 @@ enum AVCodecID {
AV_CODEC_ID_ESCAPE130,
AV_CODEC_ID_G2M,
AV_CODEC_ID_WEBP,
AV_CODEC_ID_HNM4_VIDEO,
/* various PCM "codecs" */
AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs

7
libavcodec/codec_desc.c
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@ -1236,6 +1236,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
.props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY |
AV_CODEC_PROP_LOSSLESS,
},
{
.id = AV_CODEC_ID_HNM4_VIDEO,
.type = AVMEDIA_TYPE_VIDEO,
.name = "hnm4video",
.long_name = NULL_IF_CONFIG_SMALL("HNM 4 video"),
.props = AV_CODEC_PROP_LOSSY,
},
/* various PCM "codecs" */
{

459
libavcodec/hnm4video.c
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@ -0,0 +1,459 @@
/*
* Cryo Interactive Entertainment HNM4 video decoder
*
* Copyright (c) 2012 David Kment
*
* 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 <string.h>
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "avcodec.h"
#include "bytestream.h"
#include "internal.h"
#define HNM4_CHUNK_ID_PL 19536
#define HNM4_CHUNK_ID_IZ 23113
#define HNM4_CHUNK_ID_IU 21833
#define HNM4_CHUNK_ID_SD 17491
typedef struct Hnm4VideoContext {
uint8_t version;
uint16_t width;
uint16_t height;
uint8_t *current;
uint8_t *previous;
uint8_t *buffer1;
uint8_t *buffer2;
uint8_t *processed;
uint32_t palette[256];
} Hnm4VideoContext;
static int getbit(GetByteContext *gb, uint32_t *bitbuf, int *bits)
{
int ret;
if (!*bits) {
*bitbuf = bytestream2_get_le32(gb);
*bits = 32;
}
ret = *bitbuf >> 31;
*bitbuf <<= 1;
(*bits)--;
return ret;
}
static void unpack_intraframe(AVCodecContext *avctx, uint8_t *src,
uint32_t size)
{
Hnm4VideoContext *hnm = avctx->priv_data;
GetByteContext gb;
uint32_t bitbuf = 0, writeoffset = 0, count = 0;
uint16_t word;
int32_t offset;
int bits = 0;
bytestream2_init(&gb, src, size);
while (bytestream2_tell(&gb) < size) {
if (getbit(&gb, &bitbuf, &bits)) {
if (writeoffset >= hnm->width * hnm->height) {
av_log(avctx, AV_LOG_ERROR,
"Attempting to write out of bounds");
break;
}
hnm->current[writeoffset++] = bytestream2_get_byte(&gb);
} else {
if (getbit(&gb, &bitbuf, &bits)) {
word = bytestream2_get_le16(&gb);
count = word & 0x07;
offset = (word >> 3) - 0x2000;
if (!count)
count = bytestream2_get_byte(&gb);
if (!count)
return;
} else {
count = getbit(&gb, &bitbuf, &bits) * 2;
count += getbit(&gb, &bitbuf, &bits);
offset = bytestream2_get_byte(&gb) - 0x0100;
}
count += 2;
offset += writeoffset;
if (offset < 0 || offset + count >= hnm->width * hnm->height) {
av_log(avctx, AV_LOG_ERROR, "Attempting to read out of bounds");
break;
} else if (writeoffset + count >= hnm->width * hnm->height) {
av_log(avctx, AV_LOG_ERROR,
"Attempting to write out of bounds");
break;
}
while (count--) {
hnm->current[writeoffset++] = hnm->current[offset++];
}
}
}
}
static void postprocess_current_frame(AVCodecContext *avctx)
{
Hnm4VideoContext *hnm = avctx->priv_data;
uint32_t x, y, src_x, src_y;
for (y = 0; y < hnm->height; y++) {
src_y = y - (y % 2);
src_x = src_y * hnm->width + (y % 2);
for (x = 0; x < hnm->width; x++) {
hnm->processed[(y * hnm->width) + x] = hnm->current[src_x];
src_x += 2;
}
}
}
static void copy_processed_frame(AVCodecContext *avctx, AVFrame *frame)
{
Hnm4VideoContext *hnm = avctx->priv_data;
uint8_t *src = hnm->processed;
uint8_t *dst = frame->data[0];
int y;
for (y = 0; y < hnm->height; y++) {
memcpy(dst, src, hnm->width);
src += hnm->width;
dst += frame->linesize[0];
}
}
static void decode_interframe_v4(AVCodecContext *avctx, uint8_t *src, uint32_t size)
{
Hnm4VideoContext *hnm = avctx->priv_data;
GetByteContext gb;
uint32_t writeoffset = 0, count, left, offset;
uint8_t tag, previous, backline, backward, swap;
bytestream2_init(&gb, src, size);
while (bytestream2_tell(&gb) < size) {
count = bytestream2_peek_byte(&gb) & 0x1F;
if (count == 0) {
tag = bytestream2_get_byte(&gb) & 0xE0;
tag = tag >> 5;
if (tag == 0) {
hnm->current[writeoffset++] = bytestream2_get_byte(&gb);
hnm->current[writeoffset++] = bytestream2_get_byte(&gb);
} else if (tag == 1) {
writeoffset += bytestream2_get_byte(&gb) * 2;
} else if (tag == 2) {
count = bytestream2_get_le16(&gb);
count *= 2;
writeoffset += count;
} else if (tag == 3) {
count = bytestream2_get_byte(&gb) * 2;
while (count > 0) {
hnm->current[writeoffset++] = bytestream2_peek_byte(&gb);
count--;
}
bytestream2_skip(&gb, 1);
} else {
break;
}
} else {
previous = bytestream2_peek_byte(&gb) & 0x20;
backline = bytestream2_peek_byte(&gb) & 0x40;
backward = bytestream2_peek_byte(&gb) & 0x80;
bytestream2_skip(&gb, 1);
swap = bytestream2_peek_byte(&gb) & 0x01;
offset = bytestream2_get_le16(&gb);
offset = (offset >> 1) & 0x7FFF;
offset = writeoffset + (offset * 2) - 0x8000;
left = count;
if (!backward && offset + count >= hnm->width * hnm->height) {
av_log(avctx, AV_LOG_ERROR, "Attempting to read out of bounds");
break;
} else if (backward && offset >= hnm->width * hnm->height) {
av_log(avctx, AV_LOG_ERROR, "Attempting to read out of bounds");
break;
} else if (writeoffset + count >= hnm->width * hnm->height) {
av_log(avctx, AV_LOG_ERROR,
"Attempting to write out of bounds");
break;
}
if (previous) {
while (left > 0) {
if (backline) {
hnm->current[writeoffset++] = hnm->previous[offset - (2 * hnm->width) + 1];
hnm->current[writeoffset++] = hnm->previous[offset++];
offset++;
} else {
hnm->current[writeoffset++] = hnm->previous[offset++];
hnm->current[writeoffset++] = hnm->previous[offset++];
}
if (backward)
offset -= 4;
left--;
}
} else {
while (left > 0) {
if (backline) {
hnm->current[writeoffset++] = hnm->current[offset - (2 * hnm->width) + 1];
hnm->current[writeoffset++] = hnm->current[offset++];
offset++;
} else {
hnm->current[writeoffset++] = hnm->current[offset++];
hnm->current[writeoffset++] = hnm->current[offset++];
}
if (backward)
offset -= 4;
left--;
}
}
if (swap) {
left = count;
writeoffset -= count * 2;
while (left > 0) {
swap = hnm->current[writeoffset];
hnm->current[writeoffset] = hnm->current[writeoffset + 1];
hnm->current[writeoffset + 1] = swap;
left--;
writeoffset += 2;
}
}
}
}
}
static void decode_interframe_v4a(AVCodecContext *avctx, uint8_t *src,
uint32_t size)
{
Hnm4VideoContext *hnm = avctx->priv_data;
GetByteContext gb;
uint32_t writeoffset = 0, offset;
uint8_t tag, count, previous, delta;
bytestream2_init(&gb, src, size);
while (bytestream2_tell(&gb) < size) {
count = bytestream2_peek_byte(&gb) & 0x3F;
if (count == 0) {
tag = bytestream2_get_byte(&gb) & 0xC0;
tag = tag >> 6;
if (tag == 0) {
writeoffset += bytestream2_get_byte(&gb);
} else if (tag == 1) {
hnm->current[writeoffset] = bytestream2_get_byte(&gb);
hnm->current[writeoffset + hnm->width] = bytestream2_get_byte(&gb);
writeoffset++;
} else if (tag == 2) {
writeoffset += hnm->width;
} else if (tag == 3) {
break;
}
} else {
delta = bytestream2_peek_byte(&gb) & 0x80;
previous = bytestream2_peek_byte(&gb) & 0x40;
bytestream2_skip(&gb, 1);
offset = writeoffset;
offset += bytestream2_get_le16(&gb);
if (delta)
offset -= 0x10000;
if (offset + hnm->width + count >= hnm->width * hnm->height) {
av_log(avctx, AV_LOG_ERROR, "Attempting to read out of bounds");
break;
} else if (writeoffset + hnm->width + count >= hnm->width * hnm->height) {
av_log(avctx, AV_LOG_ERROR, "Attempting to write out of bounds");
break;
}
if (previous) {
while (count > 0) {
hnm->current[writeoffset] = hnm->previous[offset];
hnm->current[writeoffset + hnm->width] = hnm->previous[offset + hnm->width];
writeoffset++;
offset++;
count--;
}
} else {
while (count > 0) {
hnm->current[writeoffset] = hnm->current[offset];
hnm->current[writeoffset + hnm->width] = hnm->current[offset + hnm->width];
writeoffset++;
offset++;
count--;
}
}
}
}
}
static void hnm_update_palette(AVCodecContext *avctx, uint8_t *src,
uint32_t size)
{
Hnm4VideoContext *hnm = avctx->priv_data;
GetByteContext gb;
uint8_t start, writeoffset;
uint16_t count;
int eight_bit_colors;
eight_bit_colors = src[7] & 0x80 && hnm->version == 0x4a;
// skip first 8 bytes
bytestream2_init(&gb, src + 8, size - 8);
while (bytestream2_tell(&gb) < size - 8) {
start = bytestream2_get_byte(&gb);
count = bytestream2_get_byte(&gb);
if (start == 255 && count == 255)
break;
if (count == 0)
count = 256;
writeoffset = start;
while (count > 0) {
hnm->palette[writeoffset] = bytestream2_get_be24(&gb);
if (!eight_bit_colors)
hnm->palette[writeoffset] <<= 2;
count--;
writeoffset++;
}
}
}
static void hnm_flip_buffers(Hnm4VideoContext *hnm)
{
uint8_t *temp;
temp = hnm->current;
hnm->current = hnm->previous;
hnm->previous = temp;
}
static int hnm_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
{
AVFrame *frame = data;
Hnm4VideoContext *hnm = avctx->priv_data;
int ret;
uint16_t chunk_id;
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return ret;
}
chunk_id = AV_RL16(avpkt->data + 4);
if (chunk_id == HNM4_CHUNK_ID_PL) {
hnm_update_palette(avctx, avpkt->data, avpkt->size);
frame->palette_has_changed = 1;
} else if (chunk_id == HNM4_CHUNK_ID_IZ) {
unpack_intraframe(avctx, avpkt->data + 12, avpkt->size - 12);
memcpy(hnm->previous, hnm->current, hnm->width * hnm->height);
if (hnm->version == 0x4a)
memcpy(hnm->processed, hnm->current, hnm->width * hnm->height);
else
postprocess_current_frame(avctx);
copy_processed_frame(avctx, frame);
frame->pict_type = AV_PICTURE_TYPE_I;
frame->key_frame = 1;
memcpy(frame->data[1], hnm->palette, 256 * 4);
*got_frame = 1;
} else if (chunk_id == HNM4_CHUNK_ID_IU) {
if (hnm->version == 0x4a) {
decode_interframe_v4a(avctx, avpkt->data + 8, avpkt->size - 8);
memcpy(hnm->processed, hnm->current, hnm->width * hnm->height);
} else {
decode_interframe_v4(avctx, avpkt->data + 8, avpkt->size - 8);
postprocess_current_frame(avctx);
}
copy_processed_frame(avctx, frame);
frame->pict_type = AV_PICTURE_TYPE_P;
frame->key_frame = 0;
memcpy(frame->data[1], hnm->palette, 256 * 4);
*got_frame = 1;
hnm_flip_buffers(hnm);
} else {
av_log(avctx, AV_LOG_ERROR, "invalid chunk id: %d\n", chunk_id);
return AVERROR_INVALIDDATA;
}
return avpkt->size;
}
static av_cold int hnm_decode_init(AVCodecContext *avctx)
{
Hnm4VideoContext *hnm = avctx->priv_data;
if (avctx->extradata_size < 1) {
av_log(avctx, AV_LOG_ERROR,
"Extradata missing, decoder requires version number\n");
return AVERROR_INVALIDDATA;
}
hnm->version = avctx->extradata[0];
avctx->pix_fmt = AV_PIX_FMT_PAL8;
hnm->width = avctx->width;
hnm->height = avctx->height;
hnm->buffer1 = av_mallocz(avctx->width * avctx->height);
hnm->buffer2 = av_mallocz(avctx->width * avctx->height);
hnm->processed = av_mallocz(avctx->width * avctx->height);
if (!hnm->buffer1 || !hnm->buffer2 || !hnm->processed) {
av_log(avctx, AV_LOG_ERROR, "av_mallocz() failed\n");
av_freep(&hnm->buffer1);
av_freep(&hnm->buffer2);
av_freep(&hnm->processed);
return AVERROR(ENOMEM);
}
hnm->current = hnm->buffer1;
hnm->previous = hnm->buffer2;
return 0;
}
static av_cold int hnm_decode_end(AVCodecContext *avctx)
{
Hnm4VideoContext *hnm = avctx->priv_data;
av_freep(&hnm->buffer1);
av_freep(&hnm->buffer2);
av_freep(&hnm->processed);
return 0;
}
AVCodec ff_hnm4_video_decoder = {
.name = "hnm4video",
.long_name = NULL_IF_CONFIG_SMALL("HNM 4 video"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_HNM4_VIDEO,
.priv_data_size = sizeof(Hnm4VideoContext),
.init = hnm_decode_init,
.close = hnm_decode_end,
.decode = hnm_decode_frame,
.capabilities = CODEC_CAP_DR1,
};

2
libavcodec/version.h
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@ -27,7 +27,7 @@
*/
#define LIBAVCODEC_VERSION_MAJOR 55
#define LIBAVCODEC_VERSION_MINOR 22
#define LIBAVCODEC_VERSION_MINOR 23
#define LIBAVCODEC_VERSION_MICRO 0
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \

1
libavformat/Makefile
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@ -142,6 +142,7 @@ OBJS-$(CONFIG_H264_DEMUXER) += h264dec.o rawdec.o
OBJS-$(CONFIG_H264_MUXER) += rawenc.o
OBJS-$(CONFIG_HLS_DEMUXER) += hls.o
OBJS-$(CONFIG_HLS_MUXER) += hlsenc.o
OBJS-$(CONFIG_HNM_DEMUXER) += hnm.o
OBJS-$(CONFIG_IDCIN_DEMUXER) += idcin.o
OBJS-$(CONFIG_IFF_DEMUXER) += iff.o
OBJS-$(CONFIG_ILBC_DEMUXER) += ilbc.o

1
libavformat/allformats.c
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@ -118,6 +118,7 @@ void av_register_all(void)
REGISTER_MUXDEMUX(H263, h263);
REGISTER_MUXDEMUX(H264, h264);
REGISTER_MUXDEMUX(HLS, hls);
REGISTER_DEMUXER (HNM, hnm);
REGISTER_DEMUXER (IDCIN, idcin);
REGISTER_DEMUXER (IFF, iff);
REGISTER_MUXDEMUX(ILBC, ilbc);

204
libavformat/hnm.c
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@ -0,0 +1,204 @@
/*
* Cryo Interactive Entertainment HNM4 demuxer
*
* Copyright (c) 2012 David Kment
*
* 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/intreadwrite.h"
#include "avformat.h"
#include "internal.h"
#define HNM4_TAG MKTAG('H', 'N', 'M', '4')
#define HNM4_SAMPLE_RATE 22050
#define HNM4_FRAME_FPS 24
#define HNM4_CHUNK_ID_PL 19536
#define HNM4_CHUNK_ID_IZ 23113
#define HNM4_CHUNK_ID_IU 21833
#define HNM4_CHUNK_ID_SD 17491
typedef struct Hnm4DemuxContext {
uint8_t version;
uint16_t width;
uint16_t height;
uint32_t filesize;
uint32_t frames;
uint32_t taboffset;
uint16_t bits;
uint16_t channels;
uint32_t framesize;
uint32_t currentframe;
int64_t pts;
uint32_t superchunk_remaining;
AVPacket vpkt;
} Hnm4DemuxContext;
static int hnm_probe(AVProbeData *p)
{
if (p->buf_size < 4)
return 0;
// check for HNM4 header.
// currently only HNM v4/v4A is supported
if (AV_RL32(&p->buf[0]) == HNM4_TAG)
return AVPROBE_SCORE_MAX;
return 0;
}
static int hnm_read_header(AVFormatContext *s)
{
Hnm4DemuxContext *hnm = s->priv_data;
AVIOContext *pb = s->pb;
AVStream *vst;
/* default context members */
hnm->pts = 0;
av_init_packet(&hnm->vpkt);
hnm->vpkt.data = NULL;
hnm->vpkt.size = 0;
hnm->superchunk_remaining = 0;
avio_skip(pb, 8);
hnm->width = avio_rl16(pb);
hnm->height = avio_rl16(pb);
hnm->filesize = avio_rl32(pb);
hnm->frames = avio_rl32(pb);
hnm->taboffset = avio_rl32(pb);
hnm->bits = avio_rl16(pb);
hnm->channels = avio_rl16(pb);
hnm->framesize = avio_rl32(pb);
avio_skip(pb, 32);
hnm->currentframe = 0;
if (hnm->width < 320 || hnm->width > 640 ||
hnm->height < 150 || hnm->height > 480) {
av_log(s, AV_LOG_ERROR,
"invalid resolution: %ux%u\n", hnm->width, hnm->height);
return AVERROR_INVALIDDATA;
}
// TODO: find a better way to detect HNM4A
if (hnm->width == 640)
hnm->version = 0x4a;
else
hnm->version = 0x40;
if (!(vst = avformat_new_stream(s, NULL)))
return AVERROR(ENOMEM);
vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
vst->codec->codec_id = AV_CODEC_ID_HNM4_VIDEO;
vst->codec->codec_tag = 0;
vst->codec->width = hnm->width;
vst->codec->height = hnm->height;
vst->codec->extradata = av_mallocz(1);
vst->codec->extradata_size = 1;
memcpy(vst->codec->extradata, &hnm->version, 1);
vst->start_time = 0;
avpriv_set_pts_info(vst, 33, 1, HNM4_FRAME_FPS);
return 0;
}
static int hnm_read_packet(AVFormatContext *s, AVPacket *pkt)
{
Hnm4DemuxContext *hnm = s->priv_data;
AVIOContext *pb = s->pb;
int ret = 0;
uint32_t superchunk_size, chunk_size;
uint16_t chunk_id;
if (hnm->currentframe == hnm->frames || pb->eof_reached)
return AVERROR_EOF;
if (hnm->superchunk_remaining == 0) {
/* parse next superchunk */
superchunk_size = avio_rl24(pb);
avio_skip(pb, 1);
hnm->superchunk_remaining = superchunk_size - 4;
}
chunk_size = avio_rl24(pb);
avio_skip(pb, 1);
chunk_id = avio_rl16(pb);
avio_skip(pb, 2);
if (chunk_size > hnm->superchunk_remaining) {
av_log(s, AV_LOG_ERROR, "invalid chunk size: %u, offset: %u\n",
chunk_size, (int) avio_tell(pb));
avio_skip(pb, hnm->superchunk_remaining - 8);
hnm->superchunk_remaining = 0;
}
switch (chunk_id) {
case HNM4_CHUNK_ID_PL:
case HNM4_CHUNK_ID_IZ:
case HNM4_CHUNK_ID_IU:
avio_seek(pb, -8, SEEK_CUR);
ret += av_get_packet(pb, pkt, chunk_size);
hnm->superchunk_remaining -= chunk_size;
if (chunk_id == HNM4_CHUNK_ID_IZ || chunk_id == HNM4_CHUNK_ID_IU)
hnm->currentframe++;
break;
case HNM4_CHUNK_ID_SD:
avio_skip(pb, chunk_size - 8);
hnm->superchunk_remaining -= chunk_size;
break;
default:
av_log(s, AV_LOG_WARNING, "unknown chunk found: %d, offset: %d\n",
chunk_id, (int) avio_tell(pb));
avio_skip(pb, chunk_size - 8);
hnm->superchunk_remaining -= chunk_size;
break;
}
return ret;
}
static int hnm_read_close(AVFormatContext *s)
{
Hnm4DemuxContext *hnm = s->priv_data;
if (hnm->vpkt.size > 0)
av_free_packet(&hnm->vpkt);
return 0;
}
AVInputFormat ff_hnm_demuxer = {
.name = "hnm",
.long_name = NULL_IF_CONFIG_SMALL("Cryo HNM v4"),
.priv_data_size = sizeof(Hnm4DemuxContext),
.read_probe = hnm_probe,
.read_header = hnm_read_header,
.read_packet = hnm_read_packet,
.read_close = hnm_read_close,
.flags = AVFMT_NO_BYTE_SEEK | AVFMT_NOGENSEARCH | AVFMT_NOBINSEARCH
};

2
libavformat/version.h
Unescape View File

@ -30,7 +30,7 @@
#include "libavutil/avutil.h"
#define LIBAVFORMAT_VERSION_MAJOR 55
#define LIBAVFORMAT_VERSION_MINOR 7
#define LIBAVFORMAT_VERSION_MINOR 8
#define LIBAVFORMAT_VERSION_MICRO 0
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \

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