本文整理汇总了C++中AV_WL32函数的典型用法代码示例。如果您正苦于以下问题：C++ AV_WL32函数的具体用法？C++ AV_WL32怎么用？C++ AV_WL32使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了AV_WL32函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。
示例1: av_md5_final
void av_md5_final(AVMD5 *ctx, uint8_t *dst)
{
int i;
uint64_t finalcount = av_le2ne64(ctx->len << 3);
av_md5_update(ctx, "\200", 1);
while ((ctx->len & 63) != 56)
av_md5_update(ctx, "", 1);
av_md5_update(ctx, (uint8_t *)&finalcount, 8);
for (i = 0; i < 4; i++)
AV_WL32(dst + 4*i, ctx->ABCD[3 - i]);
}
开发者ID:AsamQi，项目名称:ffmpeg_sln_vs2013，代码行数:14，代码来源:md5.c
示例2: av_lfg_init
void av_cold av_lfg_init(AVLFG *c, unsigned int seed){
uint8_t tmp[16]={0};
int i;
for(i=8; i<64; i+=4){
AV_WL32(tmp, seed); tmp[4]=i;
av_md5_sum(tmp, tmp, 16);
c->state[i ]= AV_RL32(tmp);
c->state[i+1]= AV_RL32(tmp+4);
c->state[i+2]= AV_RL32(tmp+8);
c->state[i+3]= AV_RL32(tmp+12);
}
c->index=0;
}
开发者ID:248668342，项目名称:ffmpeg-windows，代码行数:14，代码来源:lfg.c
示例3: read_packet
static int read_packet(AVFormatContext *s, AVPacket *pkt)
{
JVDemuxContext *jv = s->priv_data;
AVIOContext *pb = s->pb;
AVStream *ast = s->streams[0];
while (!s->pb->eof_reached && jv->pts < ast->nb_index_entries) {
const AVIndexEntry *e = ast->index_entries + jv->pts;
const JVFrame *jvf = jv->frames + jv->pts;
switch(jv->state) {
case JV_AUDIO:
jv->state++;
if (jvf->audio_size ) {
if (av_get_packet(s->pb, pkt, jvf->audio_size) < 0)
return AVERROR(ENOMEM);
pkt->stream_index = 0;
pkt->pts = e->timestamp;
pkt->flags |= PKT_FLAG_KEY;
return 0;
}
case JV_VIDEO:
jv->state++;
if (jvf->video_size || jvf->palette_size) {
int size = jvf->video_size + jvf->palette_size;
if (av_new_packet(pkt, size + JV_PREAMBLE_SIZE))
return AVERROR(ENOMEM);
AV_WL32(pkt->data, jvf->video_size);
pkt->data[4] = jvf->video_type;
if (avio_read(pb, pkt->data + JV_PREAMBLE_SIZE, size) < 0)
return AVERROR(EIO);
pkt->size = size + JV_PREAMBLE_SIZE;
pkt->stream_index = 1;
pkt->pts = jv->pts;
if (jvf->video_type != 1)
pkt->flags |= PKT_FLAG_KEY;
return 0;
}
case JV_PADDING:
avio_skip(pb, FFMAX(e->size - jvf->audio_size - jvf->video_size
- jvf->palette_size, 0));
jv->state = JV_AUDIO;
jv->pts++;
}
}
return AVERROR(EIO);
}
开发者ID:upsilon，项目名称:libav，代码行数:50，代码来源:jvdec.c
示例4: send_command_packet
/** Send a prepared MMST command packet. */
static int send_command_packet(MMSContext *mms)
{
int len= mms->write_out_ptr - mms->out_buffer;
int exact_length = (len + 7) & ~7;
int first_length= exact_length - 16;
int len8= first_length/8;
int write_result;
// update packet length fields.
AV_WL32(mms->out_buffer + 8, first_length);
AV_WL32(mms->out_buffer + 16, len8);
AV_WL32(mms->out_buffer + 32, len8-2);
memset(mms->write_out_ptr, 0, exact_length - len);
// write it out.
write_result= url_write(mms->mms_hd, mms->out_buffer, exact_length);
if(write_result != exact_length) {
dprintf(NULL, "url_write returned: %d != %d\n",
write_result, exact_length);
return AVERROR_IO;
}
return 0;
}
开发者ID:csd，项目名称:ffmpeg，代码行数:25，代码来源:mmst.c
示例5: encode_init
static int encode_init(AVCodecContext * avctx){
WMACodecContext *s = avctx->priv_data;
int i, flags1, flags2;
uint8_t *extradata;
s->avctx = avctx;
if(avctx->channels > MAX_CHANNELS)
return -1;
if(avctx->bit_rate < 24*1000)
return -1;
/* extract flag infos */
flags1 = 0;
flags2 = 1;
if (avctx->codec->id == CODEC_ID_WMAV1) {
extradata= av_malloc(4);
avctx->extradata_size= 4;
AV_WL16(extradata, flags1);
AV_WL16(extradata+2, flags2);
} else if (avctx->codec->id == CODEC_ID_WMAV2) {
extradata= av_mallocz(10);
avctx->extradata_size= 10;
AV_WL32(extradata, flags1);
AV_WL16(extradata+4, flags2);
}else
assert(0);
avctx->extradata= extradata;
s->use_exp_vlc = flags2 & 0x0001;
s->use_bit_reservoir = flags2 & 0x0002;
s->use_variable_block_len = flags2 & 0x0004;
ff_wma_init(avctx, flags2);
/* init MDCT */
for(i = 0; i < s->nb_block_sizes; i++)
ff_mdct_init(&s->mdct_ctx[i], s->frame_len_bits - i + 1, 0, 1.0);
avctx->block_align=
s->block_align= avctx->bit_rate*(int64_t)s->frame_len / (avctx->sample_rate*8);
//av_log(NULL, AV_LOG_ERROR, "%d %d %d %d\n", s->block_align, avctx->bit_rate, s->frame_len, avctx->sample_rate);
avctx->frame_size= s->frame_len;
return 0;
}
开发者ID:119，项目名称:dropcam_for_iphone，代码行数:46，代码来源:wmaenc.c
示例6: rgbpack_fields
static void rgbpack_fields(void *ctx_,
uint8_t *src[AVS_MAX_COMPONENTS],
int sstrides[AVS_MAX_COMPONENTS],
uint8_t *dst[AVS_MAX_COMPONENTS],
int dstrides[AVS_MAX_COMPONENTS],
int w, int h)
{
RGBPackContext *ctx = ctx_;
uint8_t *rgb[3], *dest;
unsigned val;
int i, j, c;
rgb[0] = src[0];
rgb[1] = src[1];
rgb[2] = src[2];
dest = dst[0];
for (j = 0; j < h; j++) {
for (i = 0; i < w; i++) {
val = 0;
if (ctx->inbpp <= 8) {
for (c = 0; c < 3; c++)
val |= rgb[c][i] << ctx->shift[c];
} else {
for (c = 0; c < 3; c++)
val |= AV_RN16(rgb[c] + i * 2) << ctx->shift[c];
}
switch (ctx->step) {
case 1:
dest[i] = val;
break;
case 2:
if (ctx->be) AV_WB16(dest + i * 2, val);
else AV_WL16(dest + i * 2, val);
break;
case 4:
if (ctx->be) AV_WB32(dest + i * 4, val);
else AV_WL32(dest + i * 4, val);
break;
}
}
for (c = 0; c < 3; c++)
rgb[c] += sstrides[0];
dest += dstrides[0];
}
}
开发者ID:lu-zero，项目名称:avscale，代码行数:46，代码来源:rgbpck.c
示例7: ff_read_riff_info
int ff_read_riff_info(AVFormatContext *s, int64_t size)
{
int64_t start, end, cur;
AVIOContext *pb = s->pb;
start = avio_tell(pb);
end = start + size;
while ((cur = avio_tell(pb)) >= 0 && cur <= end - 8 /* = tag + size */) {
uint32_t chunk_code;
int64_t chunk_size;
char key[5] = {0};
char *value;
chunk_code = avio_rl32(pb);
chunk_size = avio_rl32(pb);
if (chunk_size > end || end - chunk_size < cur || chunk_size == UINT_MAX) {
av_log(s, AV_LOG_ERROR, "too big INFO subchunk\n");
return AVERROR_INVALIDDATA;
}
chunk_size += (chunk_size & 1);
value = av_malloc(chunk_size + 1);
if (!value) {
av_log(s, AV_LOG_ERROR, "out of memory, unable to read INFO tag\n");
return AVERROR(ENOMEM);
}
AV_WL32(key, chunk_code);
if (avio_read(pb, value, chunk_size) != chunk_size) {
av_freep(key);
av_freep(value);
av_log(s, AV_LOG_ERROR, "premature end of file while reading INFO tag\n");
return AVERROR_INVALIDDATA;
}
value[chunk_size] = 0;
av_dict_set(&s->metadata, key, value, AV_DICT_DONT_STRDUP_VAL);
}
return 0;
}
开发者ID:plumbojumbo，项目名称:libav，代码行数:45，代码来源:riff.c
示例8: dxv_decompress_dxt1
static int dxv_decompress_dxt1(AVCodecContext *avctx)
{
DXVContext *ctx = avctx->priv_data;
GetByteContext *gbc = &ctx->gbc;
uint32_t value, prev, op;
int idx = 0, state = 0;
int pos = 2;
/* Copy the first two elements */
AV_WL32(ctx->tex_data, bytestream2_get_le32(gbc));
AV_WL32(ctx->tex_data + 4, bytestream2_get_le32(gbc));
/* Process input until the whole texture has been filled */
while (pos < ctx->tex_size / 4) {
CHECKPOINT(2);
/* Copy two elements from a previous offset or from the input buffer */
if (op) {
prev = AV_RL32(ctx->tex_data + 4 * (pos - idx));
AV_WL32(ctx->tex_data + 4 * pos, prev);
pos++;
prev = AV_RL32(ctx->tex_data + 4 * (pos - idx));
AV_WL32(ctx->tex_data + 4 * pos, prev);
pos++;
} else {
CHECKPOINT(2);
if (op)
prev = AV_RL32(ctx->tex_data + 4 * (pos - idx));
else
prev = bytestream2_get_le32(gbc);
AV_WL32(ctx->tex_data + 4 * pos, prev);
pos++;
CHECKPOINT(2);
if (op)
prev = AV_RL32(ctx->tex_data + 4 * (pos - idx));
else
prev = bytestream2_get_le32(gbc);
AV_WL32(ctx->tex_data + 4 * pos, prev);
pos++;
}
}
return 0;
}
开发者ID:AVLeo，项目名称:libav，代码行数:48，代码来源:dxv.c
示例9: v410_encode_frame
static int v410_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *pic, int *got_packet)
{
uint8_t *dst;
uint16_t *y, *u, *v;
uint32_t val;
int i, j, ret;
if ((ret = ff_alloc_packet(pkt, avctx->width * avctx->height * 4)) < 0) {
av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
return ret;
}
dst = pkt->data;
avctx->coded_frame->reference = 0;
avctx->coded_frame->key_frame = 1;
avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
y = (uint16_t *)pic->data[0];
u = (uint16_t *)pic->data[1];
v = (uint16_t *)pic->data[2];
for (i = 0; i < avctx->height; i++) {
for (j = 0; j < avctx->width; j++) {
val = u[j] << 2;
val |= y[j] << 12;
val |= (uint32_t) v[j] << 22;
AV_WL32(dst, val);
dst += 4;
}
y += pic->linesize[0] >> 1;
u += pic->linesize[1] >> 1;
v += pic->linesize[2] >> 1;
}
pkt->flags |= AV_PKT_FLAG_KEY;
*got_packet = 1;
return 0;
}
开发者ID:JSinglan，项目名称:libav，代码行数:39，代码来源:v410enc.c
示例10: drawtext
static void drawtext(AVFrame *pic, int x, int y, const char *txt, uint32_t color)
{
const uint8_t *font;
int font_height;
int i;
font = avpriv_cga_font, font_height = 8;
for (i = 0; txt[i]; i++) {
int char_y, mask;
uint8_t *p = pic->data[0] + y * pic->linesize[0] + (x + i * 8) * 4;
for (char_y = 0; char_y < font_height; char_y++) {
for (mask = 0x80; mask; mask >>= 1) {
if (font[txt[i] * font_height + char_y] & mask)
AV_WL32(p, color);
p += 4;
}
p += pic->linesize[0] - 8 * 4;
}
}
}
开发者ID:DeHackEd，项目名称:FFmpeg，代码行数:22，代码来源:af_afir.c
示例11: ff_side_data_set_encoder_stats
int ff_side_data_set_encoder_stats(AVPacket *pkt, int quality, int64_t *error, int error_count, int pict_type)
{
uint8_t *side_data;
int side_data_size;
int i;
side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_QUALITY_STATS, &side_data_size);
if (!side_data) {
side_data_size = 4+4+8*error_count;
side_data = av_packet_new_side_data(pkt, AV_PKT_DATA_QUALITY_STATS,
side_data_size);
}
if (!side_data || side_data_size < 4+4+8*error_count)
return AVERROR(ENOMEM);
AV_WL32(side_data , quality );
side_data[4] = pict_type;
side_data[5] = error_count;
for (i = 0; i<error_count; i++)
AV_WL64(side_data+8 + 8*i , error[i]);
return 0;
}
开发者ID:Bilibili，项目名称:FFmpeg，代码行数:24，代码来源:avpacket.c
示例12: rm_read_audio_stream_info
static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
AVStream *st, RMStream *ast, int read_all)
{
char buf[256];
uint32_t version;
int ret;
/* ra type header */
version = avio_rb16(pb); /* version */
if (version == 3) {
unsigned bytes_per_minute;
int header_size = avio_rb16(pb);
int64_t startpos = avio_tell(pb);
avio_skip(pb, 8);
bytes_per_minute = avio_rb16(pb);
avio_skip(pb, 4);
rm_read_metadata(s, pb, 0);
if ((startpos + header_size) >= avio_tell(pb) + 2) {
// fourcc (should always be "lpcJ")
avio_r8(pb);
get_str8(pb, buf, sizeof(buf));
}
// Skip extra header crap (this should never happen)
if ((startpos + header_size) > avio_tell(pb))
avio_skip(pb, header_size + startpos - avio_tell(pb));
if (bytes_per_minute)
st->codec->bit_rate = 8LL * bytes_per_minute / 60;
st->codec->sample_rate = 8000;
st->codec->channels = 1;
st->codec->channel_layout = AV_CH_LAYOUT_MONO;
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_id = AV_CODEC_ID_RA_144;
ast->deint_id = DEINT_ID_INT0;
} else {
int flavor, sub_packet_h, coded_framesize, sub_packet_size;
int codecdata_length;
unsigned bytes_per_minute;
/* old version (4) */
avio_skip(pb, 2); /* unused */
avio_rb32(pb); /* .ra4 */
avio_rb32(pb); /* data size */
avio_rb16(pb); /* version2 */
avio_rb32(pb); /* header size */
flavor= avio_rb16(pb); /* add codec info / flavor */
ast->coded_framesize = coded_framesize = avio_rb32(pb); /* coded frame size */
avio_rb32(pb); /* ??? */
bytes_per_minute = avio_rb32(pb);
if (version == 4) {
if (bytes_per_minute)
st->codec->bit_rate = 8LL * bytes_per_minute / 60;
}
avio_rb32(pb); /* ??? */
ast->sub_packet_h = sub_packet_h = avio_rb16(pb); /* 1 */
st->codec->block_align= avio_rb16(pb); /* frame size */
ast->sub_packet_size = sub_packet_size = avio_rb16(pb); /* sub packet size */
avio_rb16(pb); /* ??? */
if (version == 5) {
avio_rb16(pb); avio_rb16(pb); avio_rb16(pb);
}
st->codec->sample_rate = avio_rb16(pb);
avio_rb32(pb);
st->codec->channels = avio_rb16(pb);
if (version == 5) {
ast->deint_id = avio_rl32(pb);
avio_read(pb, buf, 4);
buf[4] = 0;
} else {
AV_WL32(buf, 0);
get_str8(pb, buf, sizeof(buf)); /* desc */
ast->deint_id = AV_RL32(buf);
get_str8(pb, buf, sizeof(buf)); /* desc */
}
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_tag = AV_RL32(buf);
st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
st->codec->codec_tag);
switch (st->codec->codec_id) {
case AV_CODEC_ID_AC3:
st->need_parsing = AVSTREAM_PARSE_FULL;
break;
case AV_CODEC_ID_RA_288:
st->codec->extradata_size= 0;
ast->audio_framesize = st->codec->block_align;
st->codec->block_align = coded_framesize;
break;
case AV_CODEC_ID_COOK:
st->need_parsing = AVSTREAM_PARSE_HEADERS;
case AV_CODEC_ID_ATRAC3:
case AV_CODEC_ID_SIPR:
if (read_all) {
codecdata_length = 0;
} else {
avio_rb16(pb); avio_r8(pb);
if (version == 5)
avio_r8(pb);
codecdata_length = avio_rb32(pb);
if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
return -1;
//.........这里部分代码省略.........
开发者ID:839687571，项目名称:ffmpeg_sln_vs2013，代码行数:101，代码来源:rmdec.c
示例13: rm_assemble_video_frame
static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb,
RMDemuxContext *rm, RMStream *vst,
AVPacket *pkt, int len, int *pseq,
int64_t *timestamp)
{
int hdr;
int seq = 0, pic_num = 0, len2 = 0, pos = 0; //init to silcense compiler warning
int type;
int ret;
hdr = avio_r8(pb); len--;
type = hdr >> 6;
if(type != 3){ // not frame as a part of packet
seq = avio_r8(pb); len--;
}
if(type != 1){ // not whole frame
len2 = get_num(pb, &len);
pos = get_num(pb, &len);
pic_num = avio_r8(pb); len--;
}
if(len<0) {
av_log(s, AV_LOG_ERROR, "Insufficient data\n");
return -1;
}
rm->remaining_len = len;
if(type&1){ // frame, not slice
if(type == 3){ // frame as a part of packet
len= len2;
*timestamp = pos;
}
if(rm->remaining_len < len) {
av_log(s, AV_LOG_ERROR, "Insufficient remaining len\n");
return -1;
}
rm->remaining_len -= len;
if(av_new_packet(pkt, len + 9) < 0)
return AVERROR(EIO);
pkt->data[0] = 0;
AV_WL32(pkt->data + 1, 1);
AV_WL32(pkt->data + 5, 0);
if ((ret = avio_read(pb, pkt->data + 9, len)) != len) {
av_free_packet(pkt);
av_log(s, AV_LOG_ERROR, "Failed to read %d bytes\n", len);
return ret < 0 ? ret : AVERROR(EIO);
}
return 0;
}
//now we have to deal with single slice
*pseq = seq;
if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
if (len2 > ffio_limit(pb, len2)) {
av_log(s, AV_LOG_ERROR, "Impossibly sized packet\n");
return AVERROR_INVALIDDATA;
}
vst->slices = ((hdr & 0x3F) << 1) + 1;
vst->videobufsize = len2 + 8*vst->slices + 1;
av_free_packet(&vst->pkt); //FIXME this should be output.
if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
return AVERROR(ENOMEM);
memset(vst->pkt.data, 0, vst->pkt.size);
vst->videobufpos = 8*vst->slices + 1;
vst->cur_slice = 0;
vst->curpic_num = pic_num;
vst->pktpos = avio_tell(pb);
}
if(type == 2)
len = FFMIN(len, pos);
if(++vst->cur_slice > vst->slices) {
av_log(s, AV_LOG_ERROR, "cur slice %d, too large\n", vst->cur_slice);
return 1;
}
if(!vst->pkt.data)
return AVERROR(ENOMEM);
AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
if(vst->videobufpos + len > vst->videobufsize) {
av_log(s, AV_LOG_ERROR, "outside videobufsize\n");
return 1;
}
if (avio_read(pb, vst->pkt.data + vst->videobufpos, len) != len)
return AVERROR(EIO);
vst->videobufpos += len;
rm->remaining_len-= len;
if (type == 2 || vst->videobufpos == vst->videobufsize) {
vst->pkt.data[0] = vst->cur_slice-1;
*pkt= vst->pkt;
vst->pkt.data= NULL;
vst->pkt.size= 0;
vst->pkt.buf = NULL;
#if FF_API_DESTRUCT_PACKET
FF_DISABLE_DEPRECATION_WARNINGS
vst->pkt.destruct = NULL;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
//.........这里部分代码省略.........
开发者ID:839687571，项目名称:ffmpeg_sln_vs2013，代码行数:101，代码来源:rmdec.c
示例14: ff_read_riff_info
int ff_read_riff_info(AVFormatContext *s, int64_t size)
{
int64_t start, end, cur;
AVIOContext *pb = s->pb;
start = avio_tell(pb);
end = start + size;
while ((cur = avio_tell(pb)) >= 0 &&
cur <= end - 8 /* = tag + size */) {
uint32_t chunk_code;
int64_t chunk_size;
char key[5] = { 0 };
char *value;
chunk_code = avio_rl32(pb);
chunk_size = avio_rl32(pb);
if (url_feof(pb)) {
if (chunk_code || chunk_size) {
av_log(s, AV_LOG_WARNING, "INFO subchunk truncated\n");
return AVERROR_INVALIDDATA;
}
return AVERROR_EOF;
}
if (chunk_size > end ||
end - chunk_size < cur ||
chunk_size == UINT_MAX) {
avio_seek(pb, -9, SEEK_CUR);
chunk_code = avio_rl32(pb);
chunk_size = avio_rl32(pb);
if (chunk_size > end || end - chunk_size < cur || chunk_size == UINT_MAX) {
av_log(s, AV_LOG_WARNING, "too big INFO subchunk\n");
return AVERROR_INVALIDDATA;
}
}
chunk_size += (chunk_size & 1);
if (!chunk_code) {
if (chunk_size)
avio_skip(pb, chunk_size);
else if (pb->eof_reached) {
av_log(s, AV_LOG_WARNING, "truncated file\n");
return AVERROR_EOF;
}
continue;
}
value = av_mallocz(chunk_size + 1);
if (!value) {
av_log(s, AV_LOG_ERROR,
"out of memory, unable to read INFO tag\n");
return AVERROR(ENOMEM);
}
AV_WL32(key, chunk_code);
if (avio_read(pb, value, chunk_size) != chunk_size) {
av_log(s, AV_LOG_WARNING,
"premature end of file while reading INFO tag\n");
}
av_dict_set(&s->metadata, key, value, AV_DICT_DONT_STRDUP_VAL);
}
return 0;
}
开发者ID:zhanjx1314，项目名称:vc-ffmpeg2，代码行数:67，代码来源:riff.c
示例15: wv_read_packet
static int wv_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
WVContext *wc = s->priv_data;
int ret;
int size, ver, off;
int64_t pos;
uint32_t block_samples;
if (s->pb->eof_reached)
return AVERROR_EOF;
if(wc->block_parsed) {
if ((ret = wv_read_block_header(s, s->pb, 0)) < 0)
return ret;
}
pos = wc->pos;
off = wc->multichannel ? 4 : 0;
if(av_new_packet(pkt, wc->blksize + WV_EXTRA_SIZE + off) < 0)
return AVERROR(ENOMEM);
if(wc->multichannel)
AV_WL32(pkt->data, wc->blksize + WV_EXTRA_SIZE + 12);
memcpy(pkt->data + off, wc->extra, WV_EXTRA_SIZE);
ret = avio_read(s->pb, pkt->data + WV_EXTRA_SIZE + off, wc->blksize);
if(ret != wc->blksize) {
av_free_packet(pkt);
return AVERROR(EIO);
}
while(!(wc->flags & WV_END_BLOCK)) {
if(avio_rl32(s->pb) != MKTAG('w', 'v', 'p', 'k')) {
av_free_packet(pkt);
return AVERROR_INVALIDDATA;
}
if((ret = av_append_packet(s->pb, pkt, 4)) < 0) {
av_free_packet(pkt);
return ret;
}
size = AV_RL32(pkt->data + pkt->size - 4);
if(size < 24 || size > WV_BLOCK_LIMIT) {
av_free_packet(pkt);
av_log(s, AV_LOG_ERROR, "Incorrect block size %d\n", size);
return AVERROR_INVALIDDATA;
}
wc->blksize = size;
ver = avio_rl16(s->pb);
if(ver < 0x402 || ver > 0x410) {
av_free_packet(pkt);
av_log(s, AV_LOG_ERROR, "Unsupported version %03X\n", ver);
return AVERROR_PATCHWELCOME;
}
avio_r8(s->pb); // track no
avio_r8(s->pb); // track sub index
wc->samples = avio_rl32(s->pb); // total samples in file
wc->soff = avio_rl32(s->pb); // offset in samples of current block
if((ret = av_append_packet(s->pb, pkt, WV_EXTRA_SIZE)) < 0) {
av_free_packet(pkt);
return ret;
}
memcpy(wc->extra, pkt->data + pkt->size - WV_EXTRA_SIZE, WV_EXTRA_SIZE);
if ((ret = wv_read_block_header(s, s->pb, 1)) < 0) {
av_free_packet(pkt);
return ret;
}
ret = av_append_packet(s->pb, pkt, wc->blksize);
if(ret < 0) {
av_free_packet(pkt);
return ret;
}
}
pkt->stream_index = 0;
wc->block_parsed = 1;
pkt->pts = wc->soff;
block_samples = AV_RN32(wc->extra);
if (block_samples > INT32_MAX)
av_log(s, AV_LOG_WARNING, "Too many samples in block: %"PRIu32"\n", block_samples);
else
pkt->duration = block_samples;
av_add_index_entry(s->streams[0], pos, pkt->pts, 0, 0, AVINDEX_KEYFRAME);
return 0;
}
开发者ID:richardpl，项目名称:libav，代码行数:82，代码来源:wv.c
示例16: encode_init
static int encode_init(AVCodecContext * avctx){
WMACodecContext *s = avctx->priv_data;
int i, flags1, flags2;
uint8_t *extradata;
s->avctx = avctx;
if(avctx->channels > MAX_CHANNELS) {
av_log(avctx, AV_LOG_ERROR, "too many channels: got %i, need %i or fewer",
avctx->channels, MAX_CHANNELS);
return AVERROR(EINVAL);
}
if (avctx->sample_rate > 48000) {
av_log(avctx, AV_LOG_ERROR, "sample rate is too high: %d > 48kHz",
avctx->sample_rate);
return AVERROR(EINVAL);
}
if(avctx->bit_rate < 24*1000) {
av_log(avctx, AV_LOG_ERROR, "bitrate too low: got %i, need 24000 or higher\n",
avctx->bit_rate);
return AVERROR(EINVAL);
}
/* extract flag infos */
flags1 = 0;
flags2 = 1;
if (avctx->codec->id == AV_CODEC_ID_WMAV1) {
extradata= av_malloc(4);
avctx->extradata_size= 4;
AV_WL16(extradata, flags1);
AV_WL16(extradata+2, flags2);
} else if (avctx->codec->id == AV_CODEC_ID_WMAV2) {
extradata= av_mallocz(10);
avctx->extradata_size= 10;
AV_WL32(extradata, flags1);
AV_WL16(extradata+4, flags2);
}else
assert(0);
avctx->extradata= extradata;
s->use_exp_vlc = flags2 & 0x0001;
s->use_bit_reservoir = flags2 & 0x0002;
s->use_variable_block_len = flags2 & 0x0004;
if (avctx->channels == 2)
s->ms_stereo = 1;
ff_wma_init(avctx, flags2);
/* init MDCT */
for(i = 0; i < s->nb_block_sizes; i++)
ff_mdct_init(&s->mdct_ctx[i], s->frame_len_bits - i + 1, 0, 1.0);
s->block_align = avctx->bit_rate * (int64_t)s->frame_len /
(avctx->sample_rate * 8);
s->block_align = FFMIN(s->block_align, MAX_CODED_SUPERFRAME_SIZE);
avctx->block_align = s->block_align;
avctx->bit_rate = avctx->block_align * 8LL * avctx->sample_rate /
s->frame_len;
avctx->frame_size = avctx->delay = s->frame_len;
#if FF_API_OLD_ENCODE_AUDIO
avctx->coded_frame = &s->frame;
avcodec_get_frame_defaults(avctx->coded_frame);
#endif
return 0;
}
开发者ID:JSinglan，项目名称:libav，代码行数:68，代码来源:wmaenc.c
示例17: wav_read_header
//.........这里部分代码省略.........
data_size = size;
next_tag_ofs = wav->data_end = size ? next_tag_ofs : INT64_MAX;
}
data_ofs = avio_tell(pb);
/* don't look for footer metadata if we can't seek or if we don't
* know where the data tag ends
*/
if (!pb->seekable || (!rf64 && !size))
goto break_loop;
break;
case MKTAG('f', 'a', 'c', 't'):
if (!sample_count)
sample_count = avio_rl32(pb);
break;
case MKTAG('b', 'e', 'x', 't'):
if ((ret = wav_parse_bext_tag(s, size)) < 0)
return ret;
break;
case MKTAG('S','M','V','0'):
if (!got_fmt) {
av_log(s, AV_LOG_ERROR, "found no 'fmt ' tag before the 'SMV0' tag\n");
return AVERROR_INVALIDDATA;
}
// SMV file, a wav file with video appended.
if (size != MKTAG('0','2','0','0')) {
av_log(s, AV_LOG_ERROR, "Unknown SMV version found\n");
goto break_loop;
}
av_log(s, AV_LOG_DEBUG, "Found SMV data\n");
wav->smv_given_first = 0;
vst = avformat_new_stream(s, NULL);
if (!vst)
return AVERROR(ENOMEM);
avio_r8(pb);
vst->id = 1;
vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
vst->codec->codec_id = AV_CODEC_ID_SMVJPEG;
vst->codec->width = avio_rl24(pb);
vst->codec->height = avio_rl24(pb);
vst->codec->extradata_size = 4;
vst->codec->extradata = av_malloc(vst->codec->extradata_size +
FF_INPUT_BUFFER_PADDING_SIZE);
if (!vst->codec->extradata) {
av_log(s, AV_LOG_ERROR, "Could not allocate extradata.\n");
return AVERROR(ENOMEM);
}
size = avio_rl24(pb);
wav->smv_data_ofs = avio_tell(pb) + (size - 5) * 3;
avio_rl24(pb);
wav->smv_block_size = avio_rl24(pb);
avpriv_set_pts_info(vst, 32, 1, avio_rl24(pb));
vst->duration = avio_rl24(pb);
avio_rl24(pb);
avio_rl24(pb);
wav->smv_frames_per_jpeg = avio_rl24(pb);
AV_WL32(vst->codec->extradata, wav->smv_frames_per_jpeg);
wav->smv_cur_pt = 0;
goto break_loop;
case MKTAG('L', 'I', 'S', 'T'):
if (size < 4) {
av_log(s, AV_LOG_ERROR, "too short LIST tag\n");
return AVERROR_INVALIDDATA;
}
switch (avio_rl32(pb)) {
case MKTAG('I', 'N', 'F', 'O'):
ff_read_riff_info(s, size - 4);
}
break;
}
/* seek to next tag unless we know that we'll run into EOF */
if ((avio_size(pb) > 0 && next_tag_ofs >= avio_size(pb)) ||
wav_seek_tag(pb, next_tag_ofs, SEEK_SET) < 0) {
break;
}
}
break_loop:
if (data_ofs < 0) {
av_log(s, AV_LOG_ERROR, "no 'data' tag found\n");
return AVERROR_INVALIDDATA;
}
avio_seek(pb, data_ofs, SEEK_SET);
if (!sample_count && st->codec->channels &&
av_get_bits_per_sample(st->codec->codec_id) && wav->data_end <= avio_size(pb))
sample_count = (data_size << 3) /
(st->codec->channels *
(uint64_t)av_get_bits_per_sample(st->codec->codec_id));
if (sample_count)
st->duration = sample_count;
ff_metadata_conv_ctx(s, NULL, wav_metadata_conv);
ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv);
return 0;
}
开发者ID:AronVietti，项目名称:FFmpeg，代码行数:101，代码来源:wavdec.c
示例18: apng_read_header
static int apng_read_header(AVFormatContext *s)
{
APNGDemuxContext *ctx = s->priv_data;
AVIOContext *pb = s->pb;
uint32_t len, tag;
AVStream *st;
int ret = AVERROR_INVALIDDATA, acTL_found = 0;
/* verify PNGSIG */
if (avio_rb64(pb) != PNGSIG)
return ret;
/* parse IHDR (must be first chunk) */
len = avio_rb32(pb);
tag = avio_rl32(pb);
if (len != 13 || tag != MKTAG('I', 'H', 'D', 'R'))
return ret;
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = AV_CODEC_ID_APNG;
st->codec->width = avio_rb32(pb);
st->codec->height = avio_rb32(pb);
if ((ret = av_image_check_size(st->codec->width, st->codec->height, 0, s)) < 0)
return ret;
/* extradata will contain every chunk up to the first fcTL (excluded) */
st->codec->extradata = av_malloc(len + 12 + FF_INPUT_BUFFER_PADDING_SIZE);
if (!st->codec->extradata)
return AVERROR(ENOMEM);
st->codec->extradata_size = len + 12;
AV_WB32(st->codec->extradata, len);
AV_WL32(st->codec->extradata+4, tag);
AV_WB32(st->codec->extradata+8, st->codec->width);
AV_WB32(st->codec->extradata+12, st->codec->height);
if ((ret = avio_read(pb, st->codec->extradata+16, 9)) < 0)
goto fail;
while (!avio_feof(pb)) {
if (acTL_found && ctx->num_play != 1) {
int64_t size = avio_size(pb);
int64_t offset = avio_tell(pb);
if (size < 0) {
ret = size;
goto fail;
} else if (offset < 0) {
ret = offset;
goto fail;
} else if ((ret = ffio_ensure_seekback(pb, size - offset)) < 0) {
av_log(s, AV_LOG_WARNING, "Could not ensure seekback, will not loop\n");
ctx->num_play = 1;
}
}
if ((ctx->num_play == 1 || !acTL_found) &&
((ret = ffio_ensure_seekback(pb, 4 /* len */ + 4 /* tag */)) < 0))
goto fail;
len = avio_rb32(pb);
if (len > 0x7fffffff) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
tag = avio_rl32(pb);
switch (tag) {
case MKTAG('a', 'c', 'T', 'L'):
if ((ret = avio_seek(pb, -8, SEEK_CUR)) < 0 ||
(ret = append_extradata(st->codec, pb, len + 12)) < 0)
goto fail;
acTL_found = 1;
ctx->num_frames = AV_RB32(st->codec->extradata + ret + 8);
ctx->num_play = AV_RB32(st->codec->extradata + ret + 12);
av_log(s, AV_LOG_DEBUG, "num_frames: %"PRIu32", num_play: %"PRIu32"\n",
ctx->num_frames, ctx->num_play);
break;
case MKTAG('f', 'c', 'T', 'L'):
if (!acTL_found) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
if ((ret = avio_seek(pb, -8, SEEK_CUR)) < 0)
goto fail;
return 0;
default:
if ((ret = avio_seek(pb, -8, SEEK_CUR)) < 0 ||
(ret = append_extradata(st->codec, pb, len + 12)) < 0)
goto fail;
}
}
fail:
if (st->codec->extradata_size) {
av_freep(&st->codec->extradata);
st->codec->extradata_size = 0;
}
return ret;
}
开发者ID:alikuro，项目名称:FFmpeg，代码行数:100，代码来源:apngdec.c
示例19: rm_assemble_video_frame
static int rm_assemble_video_frame(ffmpeg_video* p,const packet* Packet)
{
int32_t hdr, seq, pic_num, len2, pos;
int32_t type;
uint8_t* buf = (uint8_t*)Packet->Data[0];
int32_t len = Packet->Length;
int32_t used=0;
RMVideo* rm = &p->rm;
hdr = *buf++; len--;
type = hdr >> 6;
switch(type)
{
case 0: // slice
case 2: // last slice
seq = *buf++; len--;
len2 = get_num(p,buf, &used);
buf+=used;
len-=used;
used=0;
pos = get_num(p,buf, &used);
buf+=used;
len-=used;
pic_num = *buf++; len--;
break;
case 1: //whole frame
{
uint8_t addbuf[9]={0,1,1,1,1,0,0,0,0};
seq = *buf++; len--;
BufferWrite(&p->Buffer,addbuf,9,1);
BufferWrite(&p->Buffer,buf,len,2048);
}
return ERR_NONE;
case 3: //frame as a part of packet
{
uint8_t addbuf[9]={0,1,1,1,1,0,0,0,0};
len2 = get_num(p,buf, &used);
buf+=used;
len-=used;
used=0;
pos = get_num(p,buf, &used);
buf+=used;
len-=used;
pic_num = *buf++; len--;
BufferWrite(&p->Buffer,addbuf,9,1);
BufferWrite(&p->Buffer,buf,len2,2048);
}
return ERR_NONE;
}
//now we have to deal with single slice
if((seq & 0x7F) == 1 || rm->curpic_num != pic_num)
{
rm->slices = ((hdr & 0x3F) << 1) + 1;
rm->videobufsize = len2 + 8*rm->slices + 1;
av_free(rm->videobuf);
if(!(rm->videobuf = av_malloc(rm->videobufsize)))
return ERR_OUT_OF_MEMORY;
rm->videobufpos = 8*rm->slices + 1;
rm->cur_slice = 0;
rm->curpic_num = pic_num;
}
if(type == 2)
len = FFMIN(len, pos);
if(++rm->cur_slice > rm->slices)
return ERR_OUT_OF_MEMORY;
AV_WL32(rm->videobuf - 7 + 8*rm->cur_slice, 1);
AV_WL32(rm->videobuf - 3 + 8*rm->cur_slice, rm->videobufpos - 8*rm->slices - 1);
if(rm->videobufpos + len > rm->videobufsize)
return ERR_OUT_OF_MEMORY;
memcpy(rm->videobuf+rm->videobufpos,buf,len);
rm->videobufpos += len;
rm->remaining_len-= len;
if(type == 2 || (rm->videobufpos) == rm->videobufsize)
{
rm->videobuf[0] = rm->cur_slice-1;
BufferWrite(&p->Buffer,rm->videobuf,1 + 8*rm->cur_slice,1);
BufferWrite(&p->Buffer,rm->videobuf + 1 + 8*rm->slices,rm->videobufpos - 1 - 8*rm->slices,2048);
return ERR_NONE;
}
return ERR_NEED_MORE_DATA;
}
开发者ID:hhool，项目名称:tcpmp-android，代码行数:100，代码来源:ffmpegv.c
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