本文整理匯總了C++中AV_WL16函數的典型用法代碼示例。如果您正苦於以下問題：C++ AV_WL16函數的具體用法？C++ AV_WL16怎麽用？C++ AV_WL16使用的例子？那麽, 這裏精選的函數代碼示例或許可以為您提供幫助。
在下文中一共展示了AV_WL16函數的15個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的C++代碼示例。
示例1: 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->bit_rate < 24*1000) {
av_log(avctx, AV_LOG_ERROR, "bitrate too low: got %"PRId64", need 24000 or higher\n",
avctx->bit_rate);
return AVERROR(EINVAL);
}
/* 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*s->frame_len / (avctx->sample_rate*8);
//av_log(NULL, AV_LOG_ERROR, "%d %"PRId64" %d %d\n", s->block_align, avctx->bit_rate, s->frame_len, avctx->sample_rate);
avctx->frame_size= s->frame_len;
return 0;
}示例2: gamma_convert
static void gamma_convert(uint8_t * src[], int width, uint16_t *gamma)
{
int i;
uint16_t *src1 = (uint16_t*)src[0];
for (i = 0; i < width; ++i) {
uint16_t r = AV_RL16(src1 + i*4 + 0);
uint16_t g = AV_RL16(src1 + i*4 + 1);
uint16_t b = AV_RL16(src1 + i*4 + 2);
AV_WL16(src1 + i*4 + 0, gamma[r]);
AV_WL16(src1 + i*4 + 1, gamma[g]);
AV_WL16(src1 + i*4 + 2, gamma[b]);
}
}示例3: 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);
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;
}示例4: wsaud_read_packet
static int wsaud_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
AVIOContext *pb = s->pb;
unsigned char preamble[AUD_CHUNK_PREAMBLE_SIZE];
unsigned int chunk_size;
int ret = 0;
AVStream *st = s->streams[0];
if (avio_read(pb, preamble, AUD_CHUNK_PREAMBLE_SIZE) !=
AUD_CHUNK_PREAMBLE_SIZE)
return AVERROR(EIO);
/* validate the chunk */
if (AV_RL32(&preamble[4]) != AUD_CHUNK_SIGNATURE)
return AVERROR_INVALIDDATA;
chunk_size = AV_RL16(&preamble[0]);
if (st->codec->codec_id == CODEC_ID_WESTWOOD_SND1) {
/* For Westwood SND1 audio we need to add the output size and input
size to the start of the packet to match what is in VQA.
Specifically, this is needed to signal when a packet should be
decoding as raw 8-bit pcm or variable-size ADPCM. */
int out_size = AV_RL16(&preamble[2]);
if ((ret = av_new_packet(pkt, chunk_size + 4)))
return ret;
if ((ret = avio_read(pb, &pkt->data[4], chunk_size)) != chunk_size)
return ret < 0 ? ret : AVERROR(EIO);
AV_WL16(&pkt->data[0], out_size);
AV_WL16(&pkt->data[2], chunk_size);
pkt->duration = out_size;
} else {
ret = av_get_packet(pb, pkt, chunk_size);
if (ret != chunk_size)
return AVERROR(EIO);
/* 2 samples/byte, 1 or 2 samples per frame depending on stereo */
pkt->duration = (chunk_size * 2) / st->codec->channels;
}
pkt->stream_index = st->index;
return ret;
}示例5: siff_read_packet
static int siff_read_packet(AVFormatContext *s, AVPacket *pkt)
{
SIFFContext *c = s->priv_data;
int size;
if (c->has_video)
{
if (c->cur_frame >= c->frames)
return AVERROR(EIO);
if (c->curstrm == -1)
{
c->pktsize = avio_rl32(s->pb) - 4;
c->flags = avio_rl16(s->pb);
c->gmcsize = (c->flags & VB_HAS_GMC) ? 4 : 0;
if (c->gmcsize)
avio_read(s->pb, c->gmc, c->gmcsize);
c->sndsize = (c->flags & VB_HAS_AUDIO) ? avio_rl32(s->pb): 0;
c->curstrm = !!(c->flags & VB_HAS_AUDIO);
}
if (!c->curstrm)
{
size = c->pktsize - c->sndsize;
if (av_new_packet(pkt, size) < 0)
return AVERROR(ENOMEM);
AV_WL16(pkt->data, c->flags);
if (c->gmcsize)
memcpy(pkt->data + 2, c->gmc, c->gmcsize);
avio_read(s->pb, pkt->data + 2 + c->gmcsize, size - c->gmcsize - 2);
pkt->stream_index = 0;
c->curstrm = -1;
}
else
{
if (av_get_packet(s->pb, pkt, c->sndsize - 4) < 0)
return AVERROR(EIO);
pkt->stream_index = 1;
c->curstrm = 0;
}
if(!c->cur_frame || c->curstrm)
pkt->flags |= AV_PKT_FLAG_KEY;
if (c->curstrm == -1)
c->cur_frame++;
}
else
{
size = av_get_packet(s->pb, pkt, c->block_align);
if(size <= 0)
return AVERROR(EIO);
}
return pkt->size;
}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];
}
}示例7: dfa_read_header
static int dfa_read_header(AVFormatContext *s)
{
AVIOContext *pb = s->pb;
AVStream *st;
int frames;
int version;
uint32_t mspf;
if (avio_rl32(pb) != MKTAG('D', 'F', 'I', 'A')) {
av_log(s, AV_LOG_ERROR, "Invalid magic for DFA\n");
return AVERROR_INVALIDDATA;
}
version = avio_rl16(pb);
frames = avio_rl16(pb);
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_DFA;
st->codec->width = avio_rl16(pb);
st->codec->height = avio_rl16(pb);
mspf = avio_rl32(pb);
if (!mspf) {
av_log(s, AV_LOG_WARNING, "Zero FPS reported, defaulting to 10\n");
mspf = 100;
}
avpriv_set_pts_info(st, 24, mspf, 1000);
avio_skip(pb, 128 - 16); // padding
st->duration = frames;
if (ff_alloc_extradata(st->codec, 2))
return AVERROR(ENOMEM);
AV_WL16(st->codec->extradata, version);
if (version == 0x100)
st->sample_aspect_ratio = (AVRational){2, 1};
return 0;
}示例8: 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;
}示例9: bind_lavc
static int bind_lavc(audio_encoder_t *encoder, muxer_stream_t *mux_a)
{
mux_a->wf = malloc(sizeof(WAVEFORMATEX)+lavc_actx->extradata_size+256);
mux_a->wf->wFormatTag = lavc_param_atag;
mux_a->wf->nChannels = lavc_actx->channels;
mux_a->wf->nSamplesPerSec = lavc_actx->sample_rate;
mux_a->wf->nAvgBytesPerSec = (lavc_actx->bit_rate / 8);
mux_a->avg_rate= lavc_actx->bit_rate;
mux_a->h.dwRate = mux_a->wf->nAvgBytesPerSec;
if(lavc_actx->block_align)
mux_a->h.dwSampleSize = mux_a->h.dwScale = lavc_actx->block_align;
else
{
mux_a->h.dwScale = (mux_a->wf->nAvgBytesPerSec * lavc_actx->frame_size)/ mux_a->wf->nSamplesPerSec; /* for cbr */
if ((mux_a->wf->nAvgBytesPerSec *
lavc_actx->frame_size) % mux_a->wf->nSamplesPerSec)
{
mux_a->h.dwScale = lavc_actx->frame_size;
mux_a->h.dwRate = lavc_actx->sample_rate;
mux_a->h.dwSampleSize = 0; // Blocksize not constant
}
else
mux_a->h.dwSampleSize = 0;
}
if(mux_a->h.dwSampleSize)
mux_a->wf->nBlockAlign = mux_a->h.dwSampleSize;
else
mux_a->wf->nBlockAlign = 1;
mux_a->h.dwSuggestedBufferSize = (encoder->params.audio_preload*mux_a->wf->nAvgBytesPerSec)/1000;
mux_a->h.dwSuggestedBufferSize -= mux_a->h.dwSuggestedBufferSize % mux_a->wf->nBlockAlign;
switch(lavc_param_atag)
{
case 0x11: /* imaadpcm */
mux_a->wf->wBitsPerSample = 4;
mux_a->wf->cbSize = 2;
AV_WL16(mux_a->wf+1, lavc_actx->frame_size);
break;
case 0x55: /* mp3 */
mux_a->wf->cbSize = 12;
mux_a->wf->wBitsPerSample = 0; /* does not apply */
((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->wID = 1;
((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->fdwFlags = 2;
((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nBlockSize = mux_a->wf->nBlockAlign;
((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nFramesPerBlock = 1;
((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nCodecDelay = 0;
break;
default:
mux_a->wf->wBitsPerSample = 0; /* Unknown */
if (lavc_actx->extradata && (lavc_actx->extradata_size > 0))
{
memcpy(mux_a->wf+1, lavc_actx->extradata, lavc_actx->extradata_size);
mux_a->wf->cbSize = lavc_actx->extradata_size;
}
else
mux_a->wf->cbSize = 0;
break;
}
// Fix allocation
mux_a->wf = realloc(mux_a->wf, sizeof(WAVEFORMATEX)+mux_a->wf->cbSize);
encoder->input_format = AF_FORMAT_S16_NE;
encoder->min_buffer_size = mux_a->h.dwSuggestedBufferSize;
encoder->max_buffer_size = mux_a->h.dwSuggestedBufferSize*2;
return 1;
}示例10: smush_read_header
//.........這裏部分代碼省略.........
nframes = avio_rl32(pb);
if (!nframes)
return AVERROR_INVALIDDATA;
avio_skip(pb, 2); // skip pad
width = avio_rl16(pb);
height = avio_rl16(pb);
avio_skip(pb, 2); // skip pad
avio_skip(pb, size - 14);
if (avio_rb32(pb) != MKBETAG('F', 'L', 'H', 'D'))
return AVERROR_INVALIDDATA;
size = avio_rb32(pb);
while (!got_audio && ((read + 8) < size)) {
uint32_t sig, chunk_size;
if (avio_feof(pb))
return AVERROR_EOF;
sig = avio_rb32(pb);
chunk_size = avio_rb32(pb);
read += 8;
switch (sig) {
case MKBETAG('W', 'a', 'v', 'e'):
got_audio = 1;
sample_rate = avio_rl32(pb);
if (!sample_rate)
return AVERROR_INVALIDDATA;
channels = avio_rl32(pb);
if (!channels)
return AVERROR_INVALIDDATA;
avio_skip(pb, chunk_size - 8);
read += chunk_size;
break;
case MKBETAG('B', 'l', '1', '6'):
case MKBETAG('A', 'N', 'N', 'O'):
avio_skip(pb, chunk_size);
read += chunk_size;
break;
default:
return AVERROR_INVALIDDATA;
break;
}
}
avio_skip(pb, size - read);
} else {
av_log(ctx, AV_LOG_ERROR, "Wrong magic\n");
return AVERROR_INVALIDDATA;
}
vst = avformat_new_stream(ctx, 0);
if (!vst)
return AVERROR(ENOMEM);
smush->video_stream_index = vst->index;
avpriv_set_pts_info(vst, 64, 1, 15);
vst->start_time = 0;
vst->duration =
vst->nb_frames = nframes;
vst->avg_frame_rate = av_inv_q(vst->time_base);
vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
vst->codec->codec_id = AV_CODEC_ID_SANM;
vst->codec->codec_tag = 0;
vst->codec->width = width;
vst->codec->height = height;
if (!smush->version) {
if (ff_alloc_extradata(vst->codec, 1024 + 2))
return AVERROR(ENOMEM);
AV_WL16(vst->codec->extradata, subversion);
for (i = 0; i < 256; i++)
AV_WL32(vst->codec->extradata + 2 + i * 4, palette[i]);
}
if (got_audio) {
ast = avformat_new_stream(ctx, 0);
if (!ast)
return AVERROR(ENOMEM);
smush->audio_stream_index = ast->index;
ast->start_time = 0;
ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
ast->codec->codec_id = AV_CODEC_ID_ADPCM_VIMA;
ast->codec->codec_tag = 0;
ast->codec->sample_rate = sample_rate;
ast->codec->channels = channels;
avpriv_set_pts_info(ast, 64, 1, ast->codec->sample_rate);
}
return 0;
}示例11: encode_init
static av_cold int encode_init(AVCodecContext *avctx)
{
WMACodecContext *s = avctx->priv_data;
int i, flags1, flags2, block_align;
uint8_t *extradata;
int ret;
s->avctx = avctx;
if (avctx->channels > MAX_CHANNELS) {
av_log(avctx, AV_LOG_ERROR,
"too many channels: got %i, need %i or fewer\n",
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\n",
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);
if (!extradata)
return AVERROR(ENOMEM);
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);
if (!extradata)
return AVERROR(ENOMEM);
avctx->extradata_size = 10;
AV_WL32(extradata, flags1);
AV_WL16(extradata + 4, flags2);
} else {
av_assert0(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;
if ((ret = ff_wma_init(avctx, flags2)) < 0)
return ret;
/* 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);
block_align = avctx->bit_rate * (int64_t) s->frame_len /
(avctx->sample_rate * 8);
block_align = FFMIN(block_align, MAX_CODED_SUPERFRAME_SIZE);
avctx->block_align = block_align;
avctx->frame_size = avctx->initial_padding = s->frame_len;
return 0;
}示例12: decode_frame
//.........這裏部分代碼省略.........
}
if (s->stripsizesoff) {
if (s->stripsizesoff >= (unsigned)avpkt->size)
return AVERROR_INVALIDDATA;
bytestream2_init(&stripsizes, avpkt->data + s->stripsizesoff,
avpkt->size - s->stripsizesoff);
}
if (s->strippos) {
if (s->strippos >= (unsigned)avpkt->size)
return AVERROR_INVALIDDATA;
bytestream2_init(&stripdata, avpkt->data + s->strippos,
avpkt->size - s->strippos);
}
if (s->rps <= 0) {
av_log(avctx, AV_LOG_ERROR, "rps %d invalid\n", s->rps);
return AVERROR_INVALIDDATA;
}
planes = s->planar ? s->bppcount : 1;
for (plane = 0; plane < planes; plane++) {
stride = p->linesize[plane];
dst = p->data[plane];
for (i = 0; i < s->height; i += s->rps) {
if (s->stripsizesoff)
ssize = ff_tget(&stripsizes, s->sstype, le);
else
ssize = s->stripsize;
if (s->strippos)
soff = ff_tget(&stripdata, s->sot, le);
else
soff = s->stripoff;
if (soff > avpkt->size || ssize > avpkt->size - soff) {
av_log(avctx, AV_LOG_ERROR, "Invalid strip size/offset\n");
return AVERROR_INVALIDDATA;
}
if ((ret = tiff_unpack_strip(s, p, dst, stride, avpkt->data + soff, ssize, i,
FFMIN(s->rps, s->height - i))) < 0) {
if (avctx->err_recognition & AV_EF_EXPLODE)
return ret;
break;
}
dst += s->rps * stride;
}
if (s->predictor == 2) {
if (s->photometric == TIFF_PHOTOMETRIC_YCBCR) {
av_log(s->avctx, AV_LOG_ERROR, "predictor == 2 with YUV is unsupported");
return AVERROR_PATCHWELCOME;
}
dst = p->data[plane];
soff = s->bpp >> 3;
if (s->planar)
soff = FFMAX(soff / s->bppcount, 1);
ssize = s->width * soff;
if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48LE ||
s->avctx->pix_fmt == AV_PIX_FMT_RGBA64LE ||
s->avctx->pix_fmt == AV_PIX_FMT_GBRP16LE ||
s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16LE) {
for (i = 0; i < s->height; i++) {
for (j = soff; j < ssize; j += 2)
AV_WL16(dst + j, AV_RL16(dst + j) + AV_RL16(dst + j - soff));
dst += stride;
}
} else if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48BE ||
s->avctx->pix_fmt == AV_PIX_FMT_RGBA64BE ||
s->avctx->pix_fmt == AV_PIX_FMT_GBRP16BE ||
s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16BE) {
for (i = 0; i < s->height; i++) {
for (j = soff; j < ssize; j += 2)
AV_WB16(dst + j, AV_RB16(dst + j) + AV_RB16(dst + j - soff));
dst += stride;
}
} else {
for (i = 0; i < s->height; i++) {
for (j = soff; j < ssize; j++)
dst[j] += dst[j - soff];
dst += stride;
}
}
}
if (s->photometric == TIFF_PHOTOMETRIC_WHITE_IS_ZERO) {
dst = p->data[plane];
for (i = 0; i < s->height; i++) {
for (j = 0; j < p->linesize[plane]; j++)
dst[j] = (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 ? (1<<s->bpp) - 1 : 255) - dst[j];
dst += stride;
}
}
}
if (s->planar && s->bppcount > 2) {
FFSWAP(uint8_t*, p->data[0], p->data[2]);
FFSWAP(int, p->linesize[0], p->linesize[2]);
FFSWAP(uint8_t*, p->data[0], p->data[1]);
FFSWAP(int, p->linesize[0], p->linesize[1]);
}示例13: filter_out
static int filter_out(struct af_instance *af)
{
af_ac3enc_t *s = af->priv;
if (!s->pending)
return 0;
AVFrame *frame = av_frame_alloc();
if (!frame) {
MP_FATAL(af, "Could not allocate memory \n");
return -1;
}
int err = -1;
AVPacket pkt = {0};
av_init_packet(&pkt);
#if HAVE_AVCODEC_NEW_CODEC_API
// Send input as long as it wants.
while (1) {
err = read_input_frame(af, frame);
if (err < 0)
goto done;
if (err == 0)
break;
err = -1;
int lavc_ret = avcodec_send_frame(s->lavc_actx, frame);
// On EAGAIN, we're supposed to read remaining output.
if (lavc_ret == AVERROR(EAGAIN))
break;
if (lavc_ret < 0) {
MP_FATAL(af, "Encode failed.\n");
goto done;
}
s->encoder_buffered += s->input->samples;
s->input->samples = 0;
}
int lavc_ret = avcodec_receive_packet(s->lavc_actx, &pkt);
if (lavc_ret == AVERROR(EAGAIN)) {
// Need to buffer more input.
err = 0;
goto done;
}
if (lavc_ret < 0) {
MP_FATAL(af, "Encode failed.\n");
goto done;
}
#else
err = read_input_frame(af, frame);
if (err < 0)
goto done;
if (err == 0)
goto done;
err = -1;
int ok;
int lavc_ret = avcodec_encode_audio2(s->lavc_actx, &pkt, frame, &ok);
s->input->samples = 0;
if (lavc_ret < 0 || !ok) {
MP_FATAL(af, "Encode failed.\n");
goto done;
}
#endif
MP_DBG(af, "avcodec_encode_audio got %d, pending %d.\n",
pkt.size, s->pending->samples + s->input->samples);
s->encoder_buffered -= AC3_FRAME_SIZE;
struct mp_audio *out =
mp_audio_pool_get(af->out_pool, af->data, s->out_samples);
if (!out)
goto done;
mp_audio_copy_attributes(out, s->pending);
int frame_size = pkt.size;
int header_len = 0;
char hdr[8];
if (s->cfg_add_iec61937_header && pkt.size > 5) {
int bsmod = pkt.data[5] & 0x7;
int len = frame_size;
frame_size = AC3_FRAME_SIZE * 2 * 2;
header_len = 8;
AV_WL16(hdr, 0xF872); // iec 61937 syncword 1
AV_WL16(hdr + 2, 0x4E1F); // iec 61937 syncword 2
hdr[5] = bsmod; // bsmod
hdr[4] = 0x01; // data-type ac3
AV_WL16(hdr + 6, len << 3); // number of bits in payload
}
if (frame_size > out->samples * out->sstride)
abort();
char *buf = (char *)out->planes[0];
memcpy(buf, hdr, header_len);
memcpy(buf + header_len, pkt.data, pkt.size);
memset(buf + header_len + pkt.size, 0,
frame_size - (header_len + pkt.size));
//.........這裏部分代碼省略.........
示例14: wsvqa_read_packet
static int wsvqa_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
WsVqaDemuxContext *wsvqa = s->priv_data;
AVIOContext *pb = s->pb;
int ret = -1;
unsigned char preamble[VQA_PREAMBLE_SIZE];
unsigned int chunk_type;
unsigned int chunk_size;
int skip_byte;
while (avio_read(pb, preamble, VQA_PREAMBLE_SIZE) == VQA_PREAMBLE_SIZE) {
chunk_type = AV_RB32(&preamble[0]);
chunk_size = AV_RB32(&preamble[4]);
skip_byte = chunk_size & 0x01;
if ((chunk_type == SND0_TAG) || (chunk_type == SND1_TAG) ||
(chunk_type == SND2_TAG) || (chunk_type == VQFR_TAG)) {
if (av_new_packet(pkt, chunk_size))
return AVERROR(EIO);
ret = avio_read(pb, pkt->data, chunk_size);
if (ret != chunk_size) {
av_free_packet(pkt);
return AVERROR(EIO);
}
switch (chunk_type) {
case SND0_TAG:
case SND1_TAG:
case SND2_TAG:
if (wsvqa->audio_stream_index == -1) {
AVStream *st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
wsvqa->audio_stream_index = st->index;
if (!wsvqa->sample_rate)
wsvqa->sample_rate = 22050;
if (!wsvqa->channels)
wsvqa->channels = 1;
if (!wsvqa->bps)
wsvqa->bps = 8;
st->codec->sample_rate = wsvqa->sample_rate;
st->codec->bits_per_coded_sample = wsvqa->bps;
st->codec->channels = wsvqa->channels;
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
switch (chunk_type) {
case SND0_TAG:
if (wsvqa->bps == 16)
st->codec->codec_id = AV_CODEC_ID_PCM_S16LE;
else
st->codec->codec_id = AV_CODEC_ID_PCM_U8;
break;
case SND1_TAG:
st->codec->codec_id = AV_CODEC_ID_WESTWOOD_SND1;
break;
case SND2_TAG:
st->codec->codec_id = AV_CODEC_ID_ADPCM_IMA_WS;
st->codec->extradata_size = 2;
st->codec->extradata = av_mallocz(2 + FF_INPUT_BUFFER_PADDING_SIZE);
if (!st->codec->extradata)
return AVERROR(ENOMEM);
AV_WL16(st->codec->extradata, wsvqa->version);
break;
}
}
pkt->stream_index = wsvqa->audio_stream_index;
switch (chunk_type) {
case SND1_TAG:
/* unpacked size is stored in header */
pkt->duration = AV_RL16(pkt->data) / wsvqa->channels;
break;
case SND2_TAG:
/* 2 samples/byte, 1 or 2 samples per frame depending on stereo */
pkt->duration = (chunk_size * 2) / wsvqa->channels;
break;
}
break;
case VQFR_TAG:
pkt->stream_index = wsvqa->video_stream_index;
pkt->duration = 1;
break;
}
/* stay on 16-bit alignment */
if (skip_byte)
avio_skip(pb, 1);
return ret;
} else {
switch(chunk_type){
case CMDS_TAG:
break;
default:
av_log(s, AV_LOG_INFO, "Skipping unknown chunk 0x%08X\n", chunk_type);
//.........這裏部分代碼省略.........
示例15: filter_slice
static int filter_slice(RotContext *rot, ThreadData *td, int job, int nb_jobs)
{
AVFrame *in = td->in;
AVFrame *out = td->out;
const int outw = td->outw, outh = td->outh;
const int inw = td->inw, inh = td->inh;
const int plane = td->plane;
const int xi = td->xi, yi = td->yi;
const int c = td->c, s = td->s;
const int start = (outh * job ) / nb_jobs;
const int end = (outh * (job+1)) / nb_jobs;
int xprime = td->xprime + start * s;
int yprime = td->yprime + start * c;
int i, j, x, y;
for (j = start; j < end; j++) {
x = xprime + xi + FIXP*(inw-1)/2;
y = yprime + yi + FIXP*(inh-1)/2;
if (fabs(rot->angle - 0) < FLT_EPSILON && outw == inw && outh == inh) {
simple_rotate(out->data[plane] + j * out->linesize[plane],
in->data[plane] + j * in->linesize[plane],
in->linesize[plane], 0, rot->draw.pixelstep[plane], outw);
} else if (fabs(rot->angle - M_PI/2) < FLT_EPSILON && outw == inh && outh == inw) {
simple_rotate(out->data[plane] + j * out->linesize[plane],
in->data[plane] + j * rot->draw.pixelstep[plane],
in->linesize[plane], 1, rot->draw.pixelstep[plane], outw);
} else if (fabs(rot->angle - M_PI) < FLT_EPSILON && outw == inw && outh == inh) {
simple_rotate(out->data[plane] + j * out->linesize[plane],
in->data[plane] + (outh-j-1) * in->linesize[plane],
in->linesize[plane], 2, rot->draw.pixelstep[plane], outw);
} else if (fabs(rot->angle - 3*M_PI/2) < FLT_EPSILON && outw == inh && outh == inw) {
simple_rotate(out->data[plane] + j * out->linesize[plane],
in->data[plane] + (outh-j-1) * rot->draw.pixelstep[plane],
in->linesize[plane], 3, rot->draw.pixelstep[plane], outw);
} else {
for (i = 0; i < outw; i++) {
int32_t v;
int x1, y1;
uint8_t *pin, *pout;
x1 = x>>16;
y1 = y>>16;
/* the out-of-range values avoid border artifacts */
if (x1 >= -1 && x1 <= inw && y1 >= -1 && y1 <= inh) {
uint8_t inp_inv[4]; /* interpolated input value */
pout = out->data[plane] + j * out->linesize[plane] + i * rot->draw.pixelstep[plane];
if (rot->use_bilinear) {
pin = rot->interpolate_bilinear(inp_inv,
in->data[plane], in->linesize[plane], rot->draw.pixelstep[plane],
x, y, inw-1, inh-1);
} else {
int x2 = av_clip(x1, 0, inw-1);
int y2 = av_clip(y1, 0, inh-1);
pin = in->data[plane] + y2 * in->linesize[plane] + x2 * rot->draw.pixelstep[plane];
}
switch (rot->draw.pixelstep[plane]) {
case 1:
*pout = *pin;
break;
case 2:
v = AV_RL16(pin);
AV_WL16(pout, v);
break;
case 3:
v = AV_RB24(pin);
AV_WB24(pout, v);
break;
case 4:
*((uint32_t *)pout) = *((uint32_t *)pin);
break;
default:
memcpy(pout, pin, rot->draw.pixelstep[plane]);
break;
}
}
x += c;
y -= s;
}
}
xprime += s;
yprime += c;
}
return 0;
}