Commit dfca23e3 authored by Reimar Döffinger's avatar Reimar Döffinger

NuppelVideo/MythTVVideo support, including rtjpeg decoder

Originally committed as revision 5232 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 4f6a6e1f
......@@ -9,6 +9,7 @@ BERO
Mario Brito
Ronald Bultje
Maarten Daniels
Reimar Doeffinger
Tim Ferguson
Brian Foley
Arpad Gereoffy
......
......@@ -42,6 +42,7 @@ version <next>
- True Audio (TTA) decoder
- AVS demuxer and video decoder
- Smacker demuxer and decoder
- NuppelVideo/MythTV demuxer and RTjpeg decoder
version 0.4.9-pre1:
......
......@@ -134,6 +134,7 @@ Codecs:
msmpeg4.c, msmpeg4data.h Michael Niedermayer
msrle.c Mike Melanson
msvideo1.c Mike Melanson
nuv.c Reimar Doeffinger
oggtheora.c Mans Rullgard
qdm2.c, qdm2data.h Roberto Togni
qdrw.c Kostya Shishkov
......@@ -142,6 +143,7 @@ Codecs:
ra144.c, ra144.h, ra288.c, ra288.h Roberto Togni
resample2.c Michael Niedermayer
rpza.c Roberto Togni
rtjpeg.c, rtjpeg.h Reimar Doeffinger
rv10.c Michael Niedermayer
smc.c Mike Melanson
snow.c Michael Niedermayer, Loren Merritt
......@@ -191,6 +193,7 @@ Muxers/Demuxers:
mpegts* Mans Rullgard
nsvdec.c Francois Revol
nut.c Alex Beregszaszi
nuv.c Reimar Doeffinger
ogg2.c, ogg2.h Mans Rullgard
oggparsevorbis.c Mans Rullgard
psxstr.c Mike Melanson
......
......@@ -799,6 +799,7 @@ following image formats are supported:
@item ZMBV @tab @tab X @tab
@item AVS Video @tab @tab X @tab Video encoding used by the Creature Shock game.
@item Smacker Video @tab @tab X @tab Video encoding used in Smacker.
@item RTjpeg @tab @tab X @tab Video encoding used in NuppelVideo files.
@end multitable
@code{X} means that encoding (resp. decoding) is supported.
......
......@@ -180,6 +180,11 @@ ifeq ($(CONFIG_CSCD_DECODER),yes)
OBJS+= cscd.o
OBJS+= lzo.o
endif
ifeq ($(CONFIG_NUV_DECODER),yes)
OBJS+= nuv.o
OBJS+= rtjpeg.o
OBJS+= lzo.o
endif
ifeq ($(CONFIG_ULTI_DECODER),yes)
OBJS+= ulti.o
endif
......
......@@ -267,6 +267,9 @@ void avcodec_register_all(void)
#ifdef CONFIG_CSCD_DECODER
register_avcodec(&cscd_decoder);
#endif //CONFIG_CSCD_DECODER
#ifdef CONFIG_NUV_DECODER
register_avcodec(&nuv_decoder);
#endif //CONFIG_NUV_DECODER
#ifdef CONFIG_ULTI_DECODER
register_avcodec(&ulti_decoder);
#endif //CONFIG_ULTI_DECODER
......
......@@ -119,6 +119,7 @@ enum CodecID {
CODEC_ID_ZMBV,
CODEC_ID_AVS,
CODEC_ID_SMACKVIDEO,
CODEC_ID_NUV,
/* various pcm "codecs" */
CODEC_ID_PCM_S16LE= 0x10000,
......@@ -2221,6 +2222,7 @@ extern AVCodec qtrle_decoder;
extern AVCodec flac_decoder;
extern AVCodec tscc_decoder;
extern AVCodec cscd_decoder;
extern AVCodec nuv_decoder;
extern AVCodec ulti_decoder;
extern AVCodec qdraw_decoder;
extern AVCodec xl_decoder;
......
/*
* NuppelVideo decoder
* Copyright (c) 2006 Reimar Doeffinger
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include "common.h"
#include "avcodec.h"
#include "bswap.h"
#include "dsputil.h"
#include "lzo.h"
#include "rtjpeg.h"
typedef struct {
AVFrame pic;
int width, height;
unsigned int decomp_size;
unsigned char* decomp_buf;
uint32_t lq[64], cq[64];
RTJpegContext rtj;
DSPContext dsp;
} NuvContext;
/**
* \brief copy frame data from buffer to AVFrame, handling stride.
* \param f destination AVFrame
* \param src source buffer, does not use any line-stride
* \param width width of the video frame
* \param height height of the video frame
*/
static void copy_frame(AVFrame *f, uint8_t *src,
int width, int height) {
AVPicture pic;
avpicture_fill(&pic, src, PIX_FMT_YUV420P, width, height);
img_copy((AVPicture *)f, &pic, PIX_FMT_YUV420P, width, height);
}
/**
* \brief extract quantization tables from codec data into our context
*/
static int get_quant(AVCodecContext *avctx, NuvContext *c,
uint8_t *buf, int size) {
int i;
if (size < 2 * 64 * 4) {
av_log(avctx, AV_LOG_ERROR, "insufficient rtjpeg quant data\n");
return -1;
}
for (i = 0; i < 64; i++, buf += 4)
c->lq[i] = LE_32(buf);
for (i = 0; i < 64; i++, buf += 4)
c->cq[i] = LE_32(buf);
return 0;
}
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
uint8_t *buf, int buf_size) {
NuvContext *c = (NuvContext *)avctx->priv_data;
AVFrame *picture = data;
int orig_size = buf_size;
enum {NUV_UNCOMPRESSED = '0', NUV_RTJPEG = '1',
NUV_RTJPEG_IN_LZO = '2', NUV_LZO = '3',
NUV_BLACK = 'N', NUV_COPY_LAST = 'L'} comptype;
if (buf_size < 12) {
av_log(avctx, AV_LOG_ERROR, "coded frame too small\n");
return -1;
}
if (c->pic.data[0])
avctx->release_buffer(avctx, &c->pic);
c->pic.reference = 1;
c->pic.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_READABLE |
FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
if (avctx->get_buffer(avctx, &c->pic) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
// codec data (rtjpeg quant tables)
if (buf[0] == 'D' && buf[1] == 'R') {
int ret;
// skip rest of the frameheader.
buf = &buf[12];
buf_size -= 12;
ret = get_quant(avctx, c, buf, buf_size);
if (ret < 0)
return ret;
rtjpeg_decode_init(&c->rtj, &c->dsp, c->width, c->height, c->lq, c->cq);
return orig_size;
}
if (buf[0] != 'V' || buf_size < 12) {
av_log(avctx, AV_LOG_ERROR, "not a nuv video frame\n");
return -1;
}
comptype = buf[1];
// skip rest of the frameheader.
buf = &buf[12];
buf_size -= 12;
c->pic.pict_type = FF_I_TYPE;
c->pic.key_frame = 1;
// decompress/copy/whatever data
switch (comptype) {
case NUV_UNCOMPRESSED: {
int height = c->height;
if (buf_size < c->width * height * 3 / 2) {
av_log(avctx, AV_LOG_ERROR, "uncompressed frame too short\n");
height = buf_size / c->width / 3 * 2;
}
copy_frame(&c->pic, buf, c->width, height);
break;
}
case NUV_RTJPEG: {
rtjpeg_decode_frame_yuv420(&c->rtj, &c->pic, buf, buf_size);
break;
}
case NUV_RTJPEG_IN_LZO: {
int outlen = c->decomp_size, inlen = buf_size;
if (lzo1x_decode(c->decomp_buf, &outlen, buf, &inlen))
av_log(avctx, AV_LOG_ERROR, "error during lzo decompression\n");
rtjpeg_decode_frame_yuv420(&c->rtj, &c->pic, c->decomp_buf, c->decomp_size);
break;
}
case NUV_LZO: {
int outlen = c->decomp_size, inlen = buf_size;
if (lzo1x_decode(c->decomp_buf, &outlen, buf, &inlen))
av_log(avctx, AV_LOG_ERROR, "error during lzo decompression\n");
copy_frame(&c->pic, c->decomp_buf, c->width, c->height);
break;
}
case NUV_BLACK: {
memset(c->pic.data[0], 0, c->width * c->height);
memset(c->pic.data[1], 128, c->width * c->height / 4);
memset(c->pic.data[2], 128, c->width * c->height / 4);
break;
}
case NUV_COPY_LAST: {
c->pic.pict_type = FF_P_TYPE;
c->pic.key_frame = 0;
/* nothing more to do here */
break;
}
default:
av_log(avctx, AV_LOG_ERROR, "unknown compression\n");
return -1;
}
*picture = c->pic;
*data_size = sizeof(AVFrame);
return orig_size;
}
static int decode_init(AVCodecContext *avctx) {
NuvContext *c = (NuvContext *)avctx->priv_data;
avctx->width = (avctx->width + 1) & ~1;
avctx->height = (avctx->height + 1) & ~1;
if (avcodec_check_dimensions(avctx, avctx->height, avctx->width) < 0) {
return 1;
}
avctx->has_b_frames = 0;
avctx->pix_fmt = PIX_FMT_YUV420P;
c->pic.data[0] = NULL;
c->width = avctx->width;
c->height = avctx->height;
c->decomp_size = c->height * c->width * 3 / 2;
c->decomp_buf = av_malloc(c->decomp_size + LZO_OUTPUT_PADDING);
if (!c->decomp_buf) {
av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n");
return 1;
}
dsputil_init(&c->dsp, avctx);
if (avctx->extradata_size)
get_quant(avctx, c, avctx->extradata, avctx->extradata_size);
rtjpeg_decode_init(&c->rtj, &c->dsp, c->width, c->height, c->lq, c->cq);
return 0;
}
static int decode_end(AVCodecContext *avctx) {
NuvContext *c = (NuvContext *)avctx->priv_data;
av_freep(&c->decomp_buf);
if (c->pic.data[0])
avctx->release_buffer(avctx, &c->pic);
return 0;
}
AVCodec nuv_decoder = {
"nuv",
CODEC_TYPE_VIDEO,
CODEC_ID_NUV,
sizeof(NuvContext),
decode_init,
NULL,
decode_end,
decode_frame,
CODEC_CAP_DR1,
};
/*
* RTJpeg decoding functions
* Copyright (c) 2006 Reimar Doeffinger
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "common.h"
#include "bitstream.h"
#include "dsputil.h"
#include "rtjpeg.h"
#define PUT_COEFF(c) \
i = scan[coeff--]; \
block[i] = (c) * quant[i];
//! aligns the bitstream to the give power of two
#define ALIGN(a) \
n = (-get_bits_count(gb)) & (a - 1); \
if (n) {skip_bits(gb, n);}
/**
* \brief read one block from stream
* \param gb contains stream data
* \param block where data is written to
* \param scan array containing the mapping stream address -> block position
* \param quant quantization factors
*
* Note: GetBitContext is used to make the code simpler, since all data is
* aligned this could be done faster in a different way, e.g. as it is done
* in MPlayer libmpcodecs/native/RTjpegN.c
*/
static inline int get_block(GetBitContext *gb, DCTELEM *block, uint8_t *scan,
uint32_t *quant) {
int coeff, i, n;
int8_t ac;
uint8_t dc = get_bits(gb, 8);
// block not coded
if (dc == 255)
return 0;
// number of non-zero coefficients
coeff = get_bits(gb, 6);
// normally we would only need to clear the (63 - coeff) last values,
// but since we do not know where they are we just clear the whole block
memset(block, 0, 64 * sizeof(DCTELEM));
// 2 bits per coefficient
while (coeff) {
ac = get_sbits(gb, 2);
if (ac == -2)
break; // continue with more bits
PUT_COEFF(ac);
}
// 4 bits per coefficient
ALIGN(4);
while (coeff) {
ac = get_sbits(gb, 4);
if (ac == -8)
break; // continue with more bits
PUT_COEFF(ac);
}
// 8 bits per coefficient
ALIGN(8);
while (coeff) {
ac = get_sbits(gb, 8);
PUT_COEFF(ac);
}
PUT_COEFF(dc);
return 1;
}
/**
* \brief decode one rtjpeg YUV420 frame
* \param c context, must be initialized via rtjpeg_decode_init
* \param f AVFrame to place decoded frame into. If parts of the frame
* are not coded they are left unchanged, so consider initializing it
* \param buf buffer containing input data
* \param buf_size length of input data in bytes
* \return number of bytes consumed from the input buffer
*/
int rtjpeg_decode_frame_yuv420(RTJpegContext *c, AVFrame *f,
uint8_t *buf, int buf_size) {
GetBitContext gb;
int w = c->w / 16, h = c->h / 16;
int x, y;
void *y1 = f->data[0], *y2 = f->data[0] + 8 * f->linesize[0];
void *u = f->data[1], *v = f->data[2];
init_get_bits(&gb, buf, buf_size * 8);
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
if (get_block(&gb, c->block, c->scan, c->lquant))
c->dsp->idct_put(y1, f->linesize[0], c->block);
y1 += 8;
if (get_block(&gb, c->block, c->scan, c->lquant))
c->dsp->idct_put(y1, f->linesize[0], c->block);
y1 += 8;
if (get_block(&gb, c->block, c->scan, c->lquant))
c->dsp->idct_put(y2, f->linesize[0], c->block);
y2 += 8;
if (get_block(&gb, c->block, c->scan, c->lquant))
c->dsp->idct_put(y2, f->linesize[0], c->block);
y2 += 8;
if (get_block(&gb, c->block, c->scan, c->cquant))
c->dsp->idct_put(u, f->linesize[1], c->block);
u += 8;
if (get_block(&gb, c->block, c->scan, c->cquant))
c->dsp->idct_put(v, f->linesize[2], c->block);
v += 8;
}
y1 += 2 * 8 * (f->linesize[0] - w);
y2 += 2 * 8 * (f->linesize[0] - w);
u += 8 * (f->linesize[1] - w);
v += 8 * (f->linesize[2] - w);
}
return get_bits_count(&gb) / 8;
}
/**
* \brief initialize an RTJpegContext, may be called multiple times
* \param c context to initialize
* \param dsp specifies the idct to use for decoding
* \param width width of image, will be rounded down to the nearest multiple
* of 16 for decoding
* \param height height of image, will be rounded down to the nearest multiple
* of 16 for decoding
* \param lquant luma quantization table to use
* \param cquant chroma quantization table to use
*/
void rtjpeg_decode_init(RTJpegContext *c, DSPContext *dsp,
int width, int height,
uint32_t *lquant, uint32_t *cquant) {
int i;
c->dsp = dsp;
for (i = 0; i < 64; i++) {
int z = ff_zigzag_direct[i];
int p = c->dsp->idct_permutation[i];
z = ((z << 3) | (z >> 3)) & 63; // rtjpeg uses a transposed variant
// permute the scan and quantization tables for the chosen idct
c->scan[i] = c->dsp->idct_permutation[z];
c->lquant[p] = lquant[i];
c->cquant[p] = cquant[i];
}
c->w = width;
c->h = height;
}
#ifndef RTJPEG_H
#define RTJPEG_H
typedef struct {
int w, h;
DSPContext *dsp;
DCTELEM block[64];
uint8_t scan[64];
uint32_t lquant[64];
uint32_t cquant[64];
} RTJpegContext;
void rtjpeg_decode_init(RTJpegContext *c, DSPContext *dsp,
int width, int height,
uint32_t *lquant, uint32_t *cquant);
int rtjpeg_decode_frame_yuv420(RTJpegContext *c, AVFrame *f,
uint8_t *buf, int buf_size);
#endif
......@@ -18,7 +18,7 @@ OBJS+=mpeg.o mpegts.o mpegtsenc.o ffm.o crc.o img.o img2.o raw.o rm.o \
nut.o wc3movie.o mp3.o westwood.o segafilm.o idcin.o flic.o \
sierravmd.o matroska.o sol.o electronicarts.o nsvdec.o asf.o \
ogg2.o oggparsevorbis.o oggparsetheora.o oggparseflac.o daud.o aiff.o \
voc.o tta.o mm.o avs.o smacker.o
voc.o tta.o mm.o avs.o smacker.o nuv.o
# muxers
ifeq ($(CONFIG_MUXERS),yes)
......
......@@ -120,6 +120,7 @@ void av_register_all(void)
voc_init();
tta_init();
avs_init();
nuv_init();
#ifdef CONFIG_MUXERS
/* image formats */
......
......@@ -549,6 +549,9 @@ int nsvdec_init(void);
/* daud.c */
int daud_init(void);
/* nuv.c */
int nuv_init(void);
/* aiff.c */
int ff_aiff_init(void);
......
/*
* NuppelVideo demuxer.
* Copyright (c) 2006 Reimar Doeffinger.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avformat.h"
#include "avi.h"
typedef struct {
int v_id;
int a_id;
} NUVContext;
typedef enum {
NUV_VIDEO = 'V',
NUV_EXTRADATA = 'D',
NUV_AUDIO = 'A',
NUV_SEEKP = 'R',
NUV_MYTHEXT = 'X'
} frametype_t;
static int nuv_probe(AVProbeData *p) {
if (p->buf_size < 12)
return 0;
if (!memcmp(p->buf, "NuppelVideo", 12))
return AVPROBE_SCORE_MAX;
if (!memcmp(p->buf, "MythTVVideo", 12))
return AVPROBE_SCORE_MAX;
return 0;
}
//! little macro to sanitize packet size
#define PKTSIZE(s) (s & 0xffffff)
/**
* \brief read until we found all data needed for decoding
* \param vst video stream of which to change parameters
* \param ast video stream of which to change parameters
* \param myth set if this is a MythTVVideo format file
* \return 1 if all required codec data was found
*/
static int get_codec_data(ByteIOContext *pb, AVStream *vst,
AVStream *ast, int myth) {
frametype_t frametype;
if (!vst && !myth)
return 1; // no codec data needed
while (!url_feof(pb)) {
int size, subtype;
frametype = get_byte(pb);
switch (frametype) {
case NUV_EXTRADATA:
subtype = get_byte(pb);
url_fskip(pb, 6);
size = PKTSIZE(get_le32(pb));
if (subtype == 'R') {
vst->codec->extradata_size = size;
vst->codec->extradata = av_malloc(size);
get_buffer(pb, vst->codec->extradata, size);
size = 0;
if (!myth)
return 1;
}
break;
case NUV_MYTHEXT:
url_fskip(pb, 7);
size = PKTSIZE(get_le32(pb));
if (size != 128 * 4)
break;
get_le32(pb); // version
if (vst) {
vst->codec->codec_tag = get_le32(pb);
vst->codec->codec_id =
codec_get_id(codec_bmp_tags, vst->codec->codec_tag);
} else
url_fskip(pb, 4);
if (ast) {
ast->codec->codec_tag = get_le32(pb);
ast->codec->sample_rate = get_le32(pb);
ast->codec->bits_per_sample = get_le32(pb);
ast->codec->channels = get_le32(pb);
ast->codec->codec_id =
wav_codec_get_id(ast->codec->codec_tag,
ast->codec->bits_per_sample);
} else
url_fskip(pb, 4 * 4);
size -= 6 * 4;
url_fskip(pb, size);
return 1;
case NUV_SEEKP:
size = 11;
break;
default:
url_fskip(pb, 7);
size = PKTSIZE(get_le32(pb));
break;
}
url_fskip(pb, size);
}
return 0;
}
static int nuv_header(AVFormatContext *s, AVFormatParameters *ap) {
NUVContext *ctx = (NUVContext *)s->priv_data;
ByteIOContext *pb = &s->pb;
char id_string[12], version_string[5];
double aspect, fps;
int is_mythtv, width, height, v_packs, a_packs;
int stream_nr = 0;
AVStream *vst = NULL, *ast = NULL;
get_buffer(pb, id_string, 12);
is_mythtv = !memcmp(id_string, "MythTVVideo", 12);
get_buffer(pb, version_string, 5);
url_fskip(pb, 3); // padding
width = get_le32(pb);
height = get_le32(pb);
get_le32(pb); // unused, "desiredwidth"
get_le32(pb); // unused, "desiredheight"
get_byte(pb); // 'P' == progressive, 'I' == interlaced
url_fskip(pb, 3); // padding
aspect = av_int2dbl(get_le64(pb));
fps = av_int2dbl(get_le64(pb));
// number of packets per stream type, -1 means unknown, e.g. streaming
v_packs = get_le32(pb);
a_packs = get_le32(pb);
get_le32(pb); // text
get_le32(pb); // keyframe distance (?)
if (v_packs) {
ctx->v_id = stream_nr++;
vst = av_new_stream(s, ctx->v_id);
vst->codec->codec_type = CODEC_TYPE_VIDEO;
vst->codec->codec_id = CODEC_ID_NUV;
vst->codec->codec_tag = MKTAG('R', 'J', 'P', 'G');
vst->codec->width = width;
vst->codec->height = height;
vst->codec->bits_per_sample = 10;
vst->codec->sample_aspect_ratio = av_d2q(aspect, 10000);
vst->r_frame_rate = av_d2q(1.0 / fps, 10000);
av_set_pts_info(vst, 32, 1, 1000);
} else
ctx->v_id = -1;
if (a_packs) {
ctx->a_id = stream_nr++;
ast = av_new_stream(s, ctx->a_id);
ast->codec->codec_type = CODEC_TYPE_AUDIO;
ast->codec->codec_id = CODEC_ID_PCM_S16LE;
ast->codec->channels = 2;
ast->codec->sample_rate = 44100;
ast->codec->bit_rate = 2 * 2 * 44100 * 8;
ast->codec->block_align = 2 * 2;
ast->codec->bits_per_sample = 16;
av_set_pts_info(ast, 32, 1, 1000);
} else
ctx->a_id = -1;
get_codec_data(pb, vst, ast, is_mythtv);
return 0;
}
#define HDRSIZE 12
static int nuv_packet(AVFormatContext *s, AVPacket *pkt) {
NUVContext *ctx = (NUVContext *)s->priv_data;
ByteIOContext *pb = &s->pb;
uint8_t hdr[HDRSIZE];
frametype_t frametype;
int ret, size;
while (!url_feof(pb)) {
ret = get_buffer(pb, hdr, HDRSIZE);
if (ret <= 0)
return ret;
frametype = hdr[0];
size = PKTSIZE(LE_32(&hdr[8]));
switch (frametype) {
case NUV_VIDEO:
case NUV_EXTRADATA:
if (ctx->v_id < 0) {
av_log(s, AV_LOG_ERROR, "Video packet in file without video stream!\n");
url_fskip(pb, size);
break;
}
ret = av_new_packet(pkt, HDRSIZE + size);
if (ret < 0)
return ret;
pkt->pos = url_ftell(pb);
pkt->pts = LE_32(&hdr[4]);
pkt->stream_index = ctx->v_id;
memcpy(pkt->data, hdr, HDRSIZE);
ret = get_buffer(pb, pkt->data + HDRSIZE, size);
return ret;
case NUV_AUDIO:
if (ctx->a_id < 0) {
av_log(s, AV_LOG_ERROR, "Audio packet in file without audio stream!\n");
url_fskip(pb, size);
break;
}
ret = av_get_packet(pb, pkt, size);