/**
* Codec worker thread.
*
* Automatically calls ff_thread_finish_setup() if the codec does
* not provide an update_thread_context method, or if the codec returns
* before calling it.
*/
static attribute_align_arg void *frame_worker_thread(void *arg)
{
PerThreadContext *p = arg;
AVCodecContext *avctx = p->avctx;
const AVCodec *codec = avctx->codec;
while (1) {
if (atomic_load(&p->state) == STATE_INPUT_READY) {
pthread_mutex_lock(&p->mutex);
while (atomic_load(&p->state) == STATE_INPUT_READY) {
if (p->die) {
pthread_mutex_unlock(&p->mutex);
goto die;
}
pthread_cond_wait(&p->input_cond, &p->mutex);
}
pthread_mutex_unlock(&p->mutex);
}
if (!codec->update_thread_context && avctx->thread_safe_callbacks)
ff_thread_finish_setup(avctx);
pthread_mutex_lock(&p->mutex);
av_frame_unref(p->frame);
p->got_frame = 0;
p->result = codec->decode(avctx, p->frame, &p->got_frame, &p->avpkt);
if ((p->result < 0 || !p->got_frame) && p->frame->buf[0]) {
if (avctx->internal->allocate_progress)
av_log(avctx, AV_LOG_ERROR, "A frame threaded decoder did not "
"free the frame on failure. This is a bug, please report it.\n");
av_frame_unref(p->frame);
}
if (atomic_load(&p->state) == STATE_SETTING_UP)
ff_thread_finish_setup(avctx);
atomic_store(&p->state, STATE_INPUT_READY);
pthread_mutex_lock(&p->progress_mutex);
pthread_cond_signal(&p->output_cond);
pthread_mutex_unlock(&p->progress_mutex);
pthread_mutex_unlock(&p->mutex);
}
die:
return NULL;
}
/**
* Codec worker thread.
*
* Automatically calls ff_thread_finish_setup() if the codec does
* not provide an update_thread_context method, or if the codec returns
* before calling it.
*/
static attribute_align_arg void *frame_worker_thread(void *arg)
{
PerThreadContext *p = arg;
FrameThreadContext *fctx = p->parent;
AVCodecContext *avctx = p->avctx;
const AVCodec *codec = avctx->codec;
pthread_mutex_lock(&p->mutex);
while (1) {
while (p->state == STATE_INPUT_READY && !fctx->die)
pthread_cond_wait(&p->input_cond, &p->mutex);
if (fctx->die) break;
if (!codec->update_thread_context && THREAD_SAFE_CALLBACKS(avctx))
ff_thread_finish_setup(avctx);
av_frame_unref(p->frame);
p->got_frame = 0;
p->result = codec->decode(avctx, p->frame, &p->got_frame, &p->avpkt);
if ((p->result < 0 || !p->got_frame) && p->frame->buf[0]) {
if (avctx->internal->allocate_progress)
av_log(avctx, AV_LOG_ERROR, "A frame threaded decoder did not "
"free the frame on failure. This is a bug, please report it.\n");
av_frame_unref(p->frame);
}
if (p->state == STATE_SETTING_UP) ff_thread_finish_setup(avctx);
pthread_mutex_lock(&p->progress_mutex);
#if 0 //BUFREF-FIXME
for (i = 0; i < MAX_BUFFERS; i++)
if (p->progress_used[i] && (p->got_frame || p->result<0 || avctx->codec_id != AV_CODEC_ID_H264)) {
p->progress[i][0] = INT_MAX;
p->progress[i][1] = INT_MAX;
}
#endif
p->state = STATE_INPUT_READY;
pthread_cond_broadcast(&p->progress_cond);
pthread_cond_signal(&p->output_cond);
pthread_mutex_unlock(&p->progress_mutex);
}
pthread_mutex_unlock(&p->mutex);
return NULL;
}
int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f)
{
PerThreadContext *p = avctx->thread_opaque;
int *progress, err;
f->owner = avctx;
ff_init_buffer_info(avctx, f);
if (!(avctx->active_thread_type&FF_THREAD_FRAME)) {
f->thread_opaque = NULL;
return avctx->get_buffer(avctx, f);
}
if (p->state != STATE_SETTING_UP &&
(avctx->codec->update_thread_context || (!avctx->thread_safe_callbacks &&
avctx->get_buffer != avcodec_default_get_buffer))) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() cannot be called after ff_thread_finish_setup()\n");
return -1;
}
pthread_mutex_lock(&p->parent->buffer_mutex);
f->thread_opaque = progress = allocate_progress(p);
if (!progress) {
pthread_mutex_unlock(&p->parent->buffer_mutex);
return -1;
}
progress[0] =
progress[1] = -1;
if (avctx->thread_safe_callbacks ||
avctx->get_buffer == avcodec_default_get_buffer) {
err = avctx->get_buffer(avctx, f);
} else {
p->requested_frame = f;
p->state = STATE_GET_BUFFER;
pthread_mutex_lock(&p->progress_mutex);
pthread_cond_broadcast(&p->progress_cond);
while (p->state != STATE_SETTING_UP)
pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
err = p->result;
pthread_mutex_unlock(&p->progress_mutex);
if (!avctx->codec->update_thread_context)
ff_thread_finish_setup(avctx);
}
if (err) {
free_progress(f);
f->thread_opaque = NULL;
}
pthread_mutex_unlock(&p->parent->buffer_mutex);
return err;
}
/**
* Codec worker thread.
*
* Automatically calls ff_thread_finish_setup() if the codec does
* not provide an update_thread_context method, or if the codec returns
* before calling it.
*/
static attribute_align_arg void *frame_worker_thread(void *arg)
{
PerThreadContext *p = arg;
FrameThreadContext *fctx = p->parent;
AVCodecContext *avctx = p->avctx;
const AVCodec *codec = avctx->codec;
pthread_mutex_lock(&p->mutex);
while (1) {
while (p->state == STATE_INPUT_READY && !fctx->die)
pthread_cond_wait(&p->input_cond, &p->mutex);
if (fctx->die) break;
if (!codec->update_thread_context && THREAD_SAFE_CALLBACKS(avctx))
ff_thread_finish_setup(avctx);
avcodec_get_frame_defaults(&p->frame);
p->got_frame = 0;
p->result = codec->decode(avctx, &p->frame, &p->got_frame, &p->avpkt);
/* many decoders assign whole AVFrames, thus overwriting extended_data;
* make sure it's set correctly */
p->frame.extended_data = p->frame.data;
if (p->state == STATE_SETTING_UP) ff_thread_finish_setup(avctx);
pthread_mutex_lock(&p->progress_mutex);
#if 0 //BUFREF-FIXME
for (i = 0; i < MAX_BUFFERS; i++)
if (p->progress_used[i] && (p->got_frame || p->result<0 || avctx->codec_id != AV_CODEC_ID_H264)) {
p->progress[i][0] = INT_MAX;
p->progress[i][1] = INT_MAX;
}
#endif
p->state = STATE_INPUT_READY;
pthread_cond_broadcast(&p->progress_cond);
pthread_cond_signal(&p->output_cond);
pthread_mutex_unlock(&p->progress_mutex);
}
pthread_mutex_unlock(&p->mutex);
return NULL;
}
/**
* Codec worker thread.
*
* Automatically calls ff_thread_finish_setup() if the codec does
* not provide an update_thread_context method, or if the codec returns
* before calling it.
*/
static attribute_align_arg void *frame_worker_thread(void *arg)
{
PerThreadContext *p = arg;
FrameThreadContext *fctx = p->parent;
AVCodecContext *avctx = p->avctx;
AVCodec *codec = avctx->codec;
while (1) {
int i;
if (p->state == STATE_INPUT_READY && !fctx->die) {
pthread_mutex_lock(&p->mutex);
while (p->state == STATE_INPUT_READY && !fctx->die)
pthread_cond_wait(&p->input_cond, &p->mutex);
pthread_mutex_unlock(&p->mutex);
}
if (fctx->die) break;
if (!codec->update_thread_context && (avctx->thread_safe_callbacks || avctx->get_buffer == avcodec_default_get_buffer))
ff_thread_finish_setup(avctx);
pthread_mutex_lock(&p->mutex);
avcodec_get_frame_defaults(&p->frame);
p->got_frame = 0;
p->result = codec->decode(avctx, &p->frame, &p->got_frame, &p->avpkt);
if (p->state == STATE_SETTING_UP) ff_thread_finish_setup(avctx);
p->state = STATE_INPUT_READY;
pthread_mutex_lock(&p->progress_mutex);
for (i = 0; i < MAX_BUFFERS; i++)
if (p->progress_used[i] && (p->got_frame || p->result<0 || avctx->codec_id != CODEC_ID_H264)) {
p->progress[i][0] = INT_MAX;
p->progress[i][1] = INT_MAX;
}
pthread_cond_broadcast(&p->progress_cond);
pthread_cond_signal(&p->output_cond);
pthread_mutex_unlock(&p->progress_mutex);
pthread_mutex_unlock(&p->mutex);
}
return NULL;
}
/**
* Codec worker thread.
*
* Automatically calls ff_thread_finish_setup() if the codec does
* not provide an update_thread_context method, or if the codec returns
* before calling it.
*/
static attribute_align_arg void *frame_worker_thread(void *arg)
{
PerThreadContext *p = arg;
FrameThreadContext *fctx = p->parent;
AVCodecContext *avctx = p->avctx;
const AVCodec *codec = avctx->codec;
while (1) {
if (p->state == STATE_INPUT_READY && !fctx->die) {
pthread_mutex_lock(&p->mutex);
while (p->state == STATE_INPUT_READY && !fctx->die)
pthread_cond_wait(&p->input_cond, &p->mutex);
pthread_mutex_unlock(&p->mutex);
}
if (fctx->die) break;
if (!codec->update_thread_context && avctx->thread_safe_callbacks)
ff_thread_finish_setup(avctx);
pthread_mutex_lock(&p->mutex);
avcodec_get_frame_defaults(&p->frame);
p->got_frame = 0;
p->result = codec->decode(avctx, &p->frame, &p->got_frame, &p->avpkt);
/* many decoders assign whole AVFrames, thus overwriting extended_data;
* make sure it's set correctly */
p->frame.extended_data = p->frame.data;
if (p->state == STATE_SETTING_UP) ff_thread_finish_setup(avctx);
p->state = STATE_INPUT_READY;
pthread_mutex_lock(&p->progress_mutex);
pthread_cond_signal(&p->output_cond);
pthread_mutex_unlock(&p->progress_mutex);
pthread_mutex_unlock(&p->mutex);
}
return NULL;
}
static int hap_decode(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
{
HapContext *ctx = avctx->priv_data;
ThreadFrame tframe;
int ret, length;
int blocks = avctx->coded_width * avctx->coded_height / (TEXTURE_BLOCK_W * TEXTURE_BLOCK_H);
bytestream2_init(&ctx->gbc, avpkt->data, avpkt->size);
/* Check for section header */
length = parse_section_header(avctx);
if (length < 0) {
av_log(avctx, AV_LOG_ERROR, "Frame is too small.\n");
return length;
}
/* Prepare the texture buffer and decompress function */
ret = setup_texture(avctx, length);
if (ret < 0)
return ret;
/* Get the output frame ready to receive data */
tframe.f = data;
ret = ff_thread_get_buffer(avctx, &tframe, 0);
if (ret < 0)
return ret;
if (avctx->codec->update_thread_context)
ff_thread_finish_setup(avctx);
/* Use the decompress function on the texture, one block per thread */
avctx->execute2(avctx, decompress_texture_thread, tframe.f, NULL, blocks);
/* Frame is ready to be output */
tframe.f->pict_type = AV_PICTURE_TYPE_I;
tframe.f->key_frame = 1;
*got_frame = 1;
return avpkt->size;
}
/**
* Codec worker thread.
*
* Automatically calls ff_thread_finish_setup() if the codec does
* not provide an update_thread_context method, or if the codec returns
* before calling it.
*/
static attribute_align_arg void *frame_worker_thread(void *arg)
{
PerThreadContext *p = arg;
AVCodecContext *avctx = p->avctx;
const AVCodec *codec = avctx->codec;
pthread_mutex_lock(&p->mutex);
while (1) {
while (atomic_load(&p->state) == STATE_INPUT_READY && !p->die)
pthread_cond_wait(&p->input_cond, &p->mutex);
if (p->die) break;
if (!codec->update_thread_context && THREAD_SAFE_CALLBACKS(avctx))
ff_thread_finish_setup(avctx);
/* If a decoder supports hwaccel, then it must call ff_get_format().
* Since that call must happen before ff_thread_finish_setup(), the
* decoder is required to implement update_thread_context() and call
* ff_thread_finish_setup() manually. Therefore the above
* ff_thread_finish_setup() call did not happen and hwaccel_serializing
* cannot be true here. */
av_assert0(!p->hwaccel_serializing);
/* if the previous thread uses hwaccel then we take the lock to ensure
* the threads don't run concurrently */
if (avctx->hwaccel) {
pthread_mutex_lock(&p->parent->hwaccel_mutex);
p->hwaccel_serializing = 1;
}
av_frame_unref(p->frame);
p->got_frame = 0;
p->result = codec->decode(avctx, p->frame, &p->got_frame, &p->avpkt);
if ((p->result < 0 || !p->got_frame) && p->frame->buf[0]) {
if (avctx->internal->allocate_progress)
av_log(avctx, AV_LOG_ERROR, "A frame threaded decoder did not "
"free the frame on failure. This is a bug, please report it.\n");
av_frame_unref(p->frame);
}
if (atomic_load(&p->state) == STATE_SETTING_UP)
ff_thread_finish_setup(avctx);
if (p->hwaccel_serializing) {
p->hwaccel_serializing = 0;
pthread_mutex_unlock(&p->parent->hwaccel_mutex);
}
if (p->async_serializing) {
p->async_serializing = 0;
async_unlock(p->parent);
}
pthread_mutex_lock(&p->progress_mutex);
atomic_store(&p->state, STATE_INPUT_READY);
pthread_cond_broadcast(&p->progress_cond);
pthread_cond_signal(&p->output_cond);
pthread_mutex_unlock(&p->progress_mutex);
}
pthread_mutex_unlock(&p->mutex);
return NULL;
}
static int hap_decode(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
{
HapContext *ctx = avctx->priv_data;
ThreadFrame tframe;
int ret, i;
int tex_size;
bytestream2_init(&ctx->gbc, avpkt->data, avpkt->size);
/* Check for section header */
ret = hap_parse_frame_header(avctx);
if (ret < 0)
return ret;
/* Get the output frame ready to receive data */
tframe.f = data;
ret = ff_thread_get_buffer(avctx, &tframe, 0);
if (ret < 0)
return ret;
if (avctx->codec->update_thread_context)
ff_thread_finish_setup(avctx);
/* Unpack the DXT texture */
if (hap_can_use_tex_in_place(ctx)) {
/* Only DXTC texture compression in a contiguous block */
ctx->tex_data = ctx->gbc.buffer;
tex_size = bytestream2_get_bytes_left(&ctx->gbc);
} else {
/* Perform the second-stage decompression */
ret = av_reallocp(&ctx->tex_buf, ctx->tex_size);
if (ret < 0)
return ret;
avctx->execute2(avctx, decompress_chunks_thread, NULL,
ctx->chunk_results, ctx->chunk_count);
for (i = 0; i < ctx->chunk_count; i++) {
if (ctx->chunk_results[i] < 0)
return ctx->chunk_results[i];
}
ctx->tex_data = ctx->tex_buf;
tex_size = ctx->tex_size;
}
if (tex_size < (avctx->coded_width / TEXTURE_BLOCK_W)
*(avctx->coded_height / TEXTURE_BLOCK_H)
*ctx->tex_rat) {
av_log(avctx, AV_LOG_ERROR, "Insufficient data\n");
return AVERROR_INVALIDDATA;
}
/* Use the decompress function on the texture, one block per thread */
avctx->execute2(avctx, decompress_texture_thread, tframe.f, NULL, ctx->slice_count);
/* Frame is ready to be output */
tframe.f->pict_type = AV_PICTURE_TYPE_I;
tframe.f->key_frame = 1;
*got_frame = 1;
return avpkt->size;
}
static int dxv_decode(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
{
DXVContext *ctx = avctx->priv_data;
ThreadFrame tframe;
GetByteContext *gbc = &ctx->gbc;
int (*decompress_tex)(AVCodecContext *avctx);
const char *msgcomp, *msgtext;
uint32_t tag;
int version_major, version_minor = 0;
int size = 0, old_type = 0;
int ret;
bytestream2_init(gbc, avpkt->data, avpkt->size);
tag = bytestream2_get_le32(gbc);
switch (tag) {
case MKBETAG('D', 'X', 'T', '1'):
decompress_tex = dxv_decompress_dxt1;
ctx->tex_funct = ctx->texdsp.dxt1_block;
ctx->tex_rat = 8;
ctx->tex_step = 8;
msgcomp = "DXTR1";
msgtext = "DXT1";
break;
case MKBETAG('D', 'X', 'T', '5'):
decompress_tex = dxv_decompress_dxt5;
ctx->tex_funct = ctx->texdsp.dxt5_block;
ctx->tex_rat = 4;
ctx->tex_step = 16;
msgcomp = "DXTR5";
msgtext = "DXT5";
break;
case MKBETAG('Y', 'C', 'G', '6'):
case MKBETAG('Y', 'G', '1', '0'):
avpriv_report_missing_feature(avctx, "Tag 0x%08X", tag);
return AVERROR_PATCHWELCOME;
default:
/* Old version does not have a real header, just size and type. */
size = tag & 0x00FFFFFF;
old_type = tag >> 24;
version_major = (old_type & 0x0F) - 1;
if (old_type & 0x80) {
msgcomp = "RAW";
decompress_tex = dxv_decompress_raw;
} else {
msgcomp = "LZF";
decompress_tex = dxv_decompress_lzf;
}
if (old_type & 0x40) {
msgtext = "DXT5";
ctx->tex_funct = ctx->texdsp.dxt5_block;
ctx->tex_step = 16;
} else if (old_type & 0x20 || version_major == 1) {
msgtext = "DXT1";
ctx->tex_funct = ctx->texdsp.dxt1_block;
ctx->tex_step = 8;
} else {
av_log(avctx, AV_LOG_ERROR, "Unsupported header (0x%08X)\n.", tag);
return AVERROR_INVALIDDATA;
}
ctx->tex_rat = 1;
break;
}
/* New header is 12 bytes long. */
if (!old_type) {
version_major = bytestream2_get_byte(gbc) - 1;
version_minor = bytestream2_get_byte(gbc);
/* Encoder copies texture data when compression is not advantageous. */
if (bytestream2_get_byte(gbc)) {
msgcomp = "RAW";
ctx->tex_rat = 1;
decompress_tex = dxv_decompress_raw;
}
bytestream2_skip(gbc, 1); // unknown
size = bytestream2_get_le32(gbc);
}
av_log(avctx, AV_LOG_DEBUG,
"%s compression with %s texture (version %d.%d)\n",
msgcomp, msgtext, version_major, version_minor);
if (size != bytestream2_get_bytes_left(gbc)) {
av_log(avctx, AV_LOG_ERROR,
"Incomplete or invalid file (header %d, left %d).\n",
size, bytestream2_get_bytes_left(gbc));
return AVERROR_INVALIDDATA;
}
ctx->tex_size = avctx->coded_width * avctx->coded_height * 4 / ctx->tex_rat;
ret = av_reallocp(&ctx->tex_data, ctx->tex_size);
if (ret < 0)
return ret;
/* Decompress texture out of the intermediate compression. */
ret = decompress_tex(avctx);
if (ret < 0)
return ret;
tframe.f = data;
ret = ff_thread_get_buffer(avctx, &tframe, 0);
if (ret < 0)
return ret;
ff_thread_finish_setup(avctx);
/* Now decompress the texture with the standard functions. */
avctx->execute2(avctx, decompress_texture_thread,
tframe.f, NULL, ctx->slice_count);
/* Frame is ready to be output. */
tframe.f->pict_type = AV_PICTURE_TYPE_I;
tframe.f->key_frame = 1;
*got_frame = 1;
return avpkt->size;
}
static int dxv_decode(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
{
DXVContext *ctx = avctx->priv_data;
ThreadFrame tframe;
GetByteContext *gbc = &ctx->gbc;
int (*decompress_tex)(AVCodecContext *avctx);
uint32_t tag;
int channels, size = 0, old_type = 0;
int ret;
bytestream2_init(gbc, avpkt->data, avpkt->size);
tag = bytestream2_get_le32(gbc);
switch (tag) {
case MKBETAG('D', 'X', 'T', '1'):
decompress_tex = dxv_decompress_dxt1;
ctx->tex_funct = ctx->texdsp.dxt1_block;
ctx->tex_rat = 8;
ctx->tex_step = 8;
av_log(avctx, AV_LOG_DEBUG, "DXTR1 compression and DXT1 texture ");
break;
case MKBETAG('D', 'X', 'T', '5'):
decompress_tex = dxv_decompress_dxt5;
ctx->tex_funct = ctx->texdsp.dxt5_block;
ctx->tex_rat = 4;
ctx->tex_step = 16;
av_log(avctx, AV_LOG_DEBUG, "DXTR5 compression and DXT5 texture ");
break;
case MKBETAG('Y', 'C', 'G', '6'):
case MKBETAG('Y', 'G', '1', '0'):
avpriv_report_missing_feature(avctx, "Tag 0x%08X", tag);
return AVERROR_PATCHWELCOME;
default:
/* Old version does not have a real header, just size and type. */
size = tag & 0x00FFFFFF;
old_type = tag >> 24;
channels = old_type & 0x0F;
if (old_type & 0x40) {
av_log(avctx, AV_LOG_DEBUG, "LZF compression and DXT5 texture ");
ctx->tex_funct = ctx->texdsp.dxt5_block;
ctx->tex_step = 16;
} else if (old_type & 0x20) {
av_log(avctx, AV_LOG_DEBUG, "LZF compression and DXT1 texture ");
ctx->tex_funct = ctx->texdsp.dxt1_block;
ctx->tex_step = 8;
} else {
av_log(avctx, AV_LOG_ERROR, "Unsupported header (0x%08X)\n.", tag);
return AVERROR_INVALIDDATA;
}
decompress_tex = dxv_decompress_lzf;
ctx->tex_rat = 1;
break;
}
/* New header is 12 bytes long. */
if (!old_type) {
channels = bytestream2_get_byte(gbc);
bytestream2_skip(gbc, 3); // unknown
size = bytestream2_get_le32(gbc);
}
av_log(avctx, AV_LOG_DEBUG, "(%d channels)\n", channels);
if (size != bytestream2_get_bytes_left(gbc)) {
av_log(avctx, AV_LOG_ERROR, "Incomplete or invalid file (%u > %u)\n.",
size, bytestream2_get_bytes_left(gbc));
return AVERROR_INVALIDDATA;
}
ctx->tex_size = avctx->coded_width * avctx->coded_height * 4 / ctx->tex_rat;
ret = av_reallocp(&ctx->tex_data, ctx->tex_size);
if (ret < 0)
return ret;
/* Decompress texture out of the intermediate compression. */
ret = decompress_tex(avctx);
if (ret < 0)
return ret;
tframe.f = data;
ret = ff_thread_get_buffer(avctx, &tframe, 0);
if (ret < 0)
return ret;
ff_thread_finish_setup(avctx);
/* Now decompress the texture with the standard functions. */
avctx->execute2(avctx, decompress_texture_thread,
tframe.f, NULL, ctx->slice_count);
/* Frame is ready to be output. */
tframe.f->pict_type = AV_PICTURE_TYPE_I;
tframe.f->key_frame = 1;
*got_frame = 1;
return avpkt->size;
}
static int libopenjpeg_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
AVPacket *avpkt)
{
uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
LibOpenJPEGContext *ctx = avctx->priv_data;
AVFrame *picture = &ctx->image, *output = data;
opj_dinfo_t *dec;
opj_cio_t *stream;
opj_image_t *image;
int width, height, has_alpha = 0, ret = -1;
int x, y, index;
uint8_t *img_ptr;
int adjust[4];
*data_size = 0;
// Check if input is a raw jpeg2k codestream or in jp2 wrapping
if((AV_RB32(buf) == 12) &&
(AV_RB32(buf + 4) == JP2_SIG_TYPE) &&
(AV_RB32(buf + 8) == JP2_SIG_VALUE)) {
dec = opj_create_decompress(CODEC_JP2);
} else {
// If the AVPacket contains a jp2c box, then skip to
// the starting byte of the codestream.
if (AV_RB32(buf + 4) == AV_RB32("jp2c"))
buf += 8;
dec = opj_create_decompress(CODEC_J2K);
}
if(!dec) {
av_log(avctx, AV_LOG_ERROR, "Error initializing decoder.\n");
return -1;
}
opj_set_event_mgr((opj_common_ptr)dec, NULL, NULL);
ctx->dec_params.cp_limit_decoding = LIMIT_TO_MAIN_HEADER;
// Tie decoder with decoding parameters
opj_setup_decoder(dec, &ctx->dec_params);
stream = opj_cio_open((opj_common_ptr)dec, buf, buf_size);
if(!stream) {
av_log(avctx, AV_LOG_ERROR, "Codestream could not be opened for reading.\n");
opj_destroy_decompress(dec);
return -1;
}
// Decode the header only
image = opj_decode_with_info(dec, stream, NULL);
opj_cio_close(stream);
if(!image) {
av_log(avctx, AV_LOG_ERROR, "Error decoding codestream.\n");
opj_destroy_decompress(dec);
return -1;
}
width = image->x1 - image->x0;
height = image->y1 - image->y0;
if(av_image_check_size(width, height, 0, avctx) < 0) {
av_log(avctx, AV_LOG_ERROR, "%dx%d dimension invalid.\n", width, height);
goto done;
}
avcodec_set_dimensions(avctx, width, height);
switch(image->numcomps)
{
case 1:
avctx->pix_fmt = PIX_FMT_GRAY8;
break;
case 3:
if(check_image_attributes(image)) {
avctx->pix_fmt = PIX_FMT_RGB24;
} else {
avctx->pix_fmt = PIX_FMT_GRAY8;
av_log(avctx, AV_LOG_ERROR, "Only first component will be used.\n");
}
break;
case 4:
has_alpha = 1;
avctx->pix_fmt = PIX_FMT_RGBA;
break;
default:
av_log(avctx, AV_LOG_ERROR, "%d components unsupported.\n", image->numcomps);
goto done;
}
if(picture->data[0])
ff_thread_release_buffer(avctx, picture);
if(ff_thread_get_buffer(avctx, picture) < 0) {
av_log(avctx, AV_LOG_ERROR, "ff_thread_get_buffer() failed\n");
return -1;
}
ff_thread_finish_setup(avctx);
ctx->dec_params.cp_limit_decoding = NO_LIMITATION;
ctx->dec_params.cp_reduce = avctx->lowres;
// Tie decoder with decoding parameters
opj_setup_decoder(dec, &ctx->dec_params);
stream = opj_cio_open((opj_common_ptr)dec, buf, buf_size);
if(!stream) {
av_log(avctx, AV_LOG_ERROR, "Codestream could not be opened for reading.\n");
opj_destroy_decompress(dec);
return -1;
}
// Decode the codestream
image = opj_decode_with_info(dec, stream, NULL);
opj_cio_close(stream);
for(x = 0; x < image->numcomps; x++) {
adjust[x] = FFMAX(image->comps[x].prec - 8, 0);
}
for(y = 0; y < avctx->height; y++) {
index = y*avctx->width;
img_ptr = picture->data[0] + y*picture->linesize[0];
for(x = 0; x < avctx->width; x++, index++) {
*img_ptr++ = image->comps[0].data[index] >> adjust[0];
if(image->numcomps > 2 && check_image_attributes(image)) {
*img_ptr++ = image->comps[1].data[index] >> adjust[1];
*img_ptr++ = image->comps[2].data[index] >> adjust[2];
if(has_alpha)
*img_ptr++ = image->comps[3].data[index] >> adjust[3];
}
}
}
