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lavc/videotoolboxenc: set extradata when opening codec 

VideoToolbox doesn't supply parameter sets until the first frame is done
encoding. This spins up a temporary encoder and encodes a single frame to
get this data.

Signed-off-by: Rick Kern <kernrj@gmail.com>
tags/n3.1
Rick Kern 9 years ago
parent
c5a5ca754b
commit
98a3355c6a
1 changed files with 241 additions and 85 deletions
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  1. +241
    -85
      libavcodec/videotoolboxenc.c

+ 241
- 85
libavcodec/videotoolboxenc.c View File

@@ -96,6 +96,13 @@ typedef struct VTEncContext {
bool warned_color_range;
} VTEncContext;

static int vtenc_populate_extradata(AVCodecContext *avctx,
CMVideoCodecType codec_type,
CFStringRef profile_level,
CFNumberRef gamma_level,
CFDictionaryRef enc_info,
CFDictionaryRef pixel_buffer_info);

/**
* NULL-safe release of *refPtr, and sets value to NULL.
*/
@@ -388,7 +395,7 @@ static int set_extradata(AVCodecContext *avctx, CMSampleBufferRef sample_buffer)
return status;
}

avctx->extradata = av_malloc(total_size);
avctx->extradata = av_mallocz(total_size + AV_INPUT_BUFFER_PADDING_SIZE);
if (!avctx->extradata) {
return AVERROR(ENOMEM);
}
@@ -761,83 +768,28 @@ static int get_cv_ycbcr_matrix(AVCodecContext *avctx, CFStringRef *matrix) {
return 0;
}


static av_cold int vtenc_init(AVCodecContext *avctx)
static int vtenc_create_encoder(AVCodecContext *avctx,
CMVideoCodecType codec_type,
CFStringRef profile_level,
CFNumberRef gamma_level,
CFDictionaryRef enc_info,
CFDictionaryRef pixel_buffer_info,
VTCompressionSessionRef *session)
{
CFMutableDictionaryRef enc_info;
CFMutableDictionaryRef pixel_buffer_info;
CMVideoCodecType codec_type;
VTEncContext *vtctx = avctx->priv_data;
CFStringRef profile_level;
SInt32 bit_rate = avctx->bit_rate;
CFNumberRef bit_rate_num;
CFBooleanRef has_b_frames_cfbool;
CFNumberRef gamma_level;
int status;

codec_type = get_cm_codec_type(avctx->codec_id);
if (!codec_type) {
av_log(avctx, AV_LOG_ERROR, "Error: no mapping for AVCodecID %d\n", avctx->codec_id);
return AVERROR(EINVAL);
}

vtctx->has_b_frames = avctx->max_b_frames > 0;
if(vtctx->has_b_frames && vtctx->profile == H264_PROF_BASELINE){
av_log(avctx, AV_LOG_WARNING, "Cannot use B-frames with baseline profile. Output will not contain B-frames.\n");
vtctx->has_b_frames = false;
}

if (vtctx->entropy == VT_CABAC && vtctx->profile == H264_PROF_BASELINE) {
av_log(avctx, AV_LOG_WARNING, "CABAC entropy requires 'main' or 'high' profile, but baseline was requested. Encode will not use CABAC entropy.\n");
vtctx->entropy = VT_ENTROPY_NOT_SET;
}

if (!get_vt_profile_level(avctx, &profile_level)) return AVERROR(EINVAL);

vtctx->session = NULL;

enc_info = CFDictionaryCreateMutable(
kCFAllocatorDefault,
20,
&kCFCopyStringDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks
);

if (!enc_info) return AVERROR(ENOMEM);

#if !TARGET_OS_IPHONE
if (!vtctx->allow_sw) {
CFDictionarySetValue(enc_info, kVTVideoEncoderSpecification_RequireHardwareAcceleratedVideoEncoder, kCFBooleanTrue);
} else {
CFDictionarySetValue(enc_info, kVTVideoEncoderSpecification_EnableHardwareAcceleratedVideoEncoder, kCFBooleanTrue);
}
#endif

if (avctx->pix_fmt != AV_PIX_FMT_VIDEOTOOLBOX) {
status = create_cv_pixel_buffer_info(avctx, &pixel_buffer_info);
if (status) {
CFRelease(enc_info);
return status;
}
} else {
pixel_buffer_info = NULL;
}

status = VTCompressionSessionCreate(
kCFAllocatorDefault,
avctx->width,
avctx->height,
codec_type,
enc_info,
pixel_buffer_info,
kCFAllocatorDefault,
vtenc_output_callback,
avctx,
&vtctx->session
);

if (pixel_buffer_info) CFRelease(pixel_buffer_info);
CFRelease(enc_info);
VTEncContext *vtctx = avctx->priv_data;
SInt32 bit_rate = avctx->bit_rate;
CFNumberRef bit_rate_num;

int status = VTCompressionSessionCreate(kCFAllocatorDefault,
avctx->width,
avctx->height,
codec_type,
enc_info,
pixel_buffer_info,
kCFAllocatorDefault,
vtenc_output_callback,
avctx,
session);

if (status || !vtctx->session) {
av_log(avctx, AV_LOG_ERROR, "Error: cannot create compression session: %d\n", status);
@@ -982,8 +934,8 @@ static av_cold int vtenc_init(AVCodecContext *avctx)
}
}

status = get_cv_transfer_function(avctx, &vtctx->transfer_function, &gamma_level);
if (!status && vtctx->transfer_function) {
if (vtctx->transfer_function) {
status = VTSessionSetProperty(vtctx->session,
kVTCompressionPropertyKey_TransferFunction,
vtctx->transfer_function);
@@ -993,8 +945,8 @@ static av_cold int vtenc_init(AVCodecContext *avctx)
}
}

status = get_cv_ycbcr_matrix(avctx, &vtctx->ycbcr_matrix);
if (!status && vtctx->ycbcr_matrix) {
if (vtctx->ycbcr_matrix) {
status = VTSessionSetProperty(vtctx->session,
kVTCompressionPropertyKey_YCbCrMatrix,
vtctx->ycbcr_matrix);
@@ -1004,8 +956,8 @@ static av_cold int vtenc_init(AVCodecContext *avctx)
}
}

status = get_cv_color_primaries(avctx, &vtctx->color_primaries);
if (!status && vtctx->color_primaries) {
if (vtctx->color_primaries) {
status = VTSessionSetProperty(vtctx->session,
kVTCompressionPropertyKey_ColorPrimaries,
vtctx->color_primaries);
@@ -1015,7 +967,7 @@ static av_cold int vtenc_init(AVCodecContext *avctx)
}
}

if (!status && gamma_level) {
if (gamma_level) {
status = VTSessionSetProperty(vtctx->session,
kCVImageBufferGammaLevelKey,
gamma_level);
@@ -1067,10 +1019,97 @@ static av_cold int vtenc_init(AVCodecContext *avctx)
return AVERROR_EXTERNAL;
}

return 0;
}

static av_cold int vtenc_init(AVCodecContext *avctx)
{
CFMutableDictionaryRef enc_info;
CFMutableDictionaryRef pixel_buffer_info;
CMVideoCodecType codec_type;
VTEncContext *vtctx = avctx->priv_data;
CFStringRef profile_level;
CFBooleanRef has_b_frames_cfbool;
CFNumberRef gamma_level = NULL;
int status;

codec_type = get_cm_codec_type(avctx->codec_id);
if (!codec_type) {
av_log(avctx, AV_LOG_ERROR, "Error: no mapping for AVCodecID %d\n", avctx->codec_id);
return AVERROR(EINVAL);
}

vtctx->has_b_frames = avctx->max_b_frames > 0;
if(vtctx->has_b_frames && vtctx->profile == H264_PROF_BASELINE){
av_log(avctx, AV_LOG_WARNING, "Cannot use B-frames with baseline profile. Output will not contain B-frames.\n");
vtctx->has_b_frames = false;
}

if (vtctx->entropy == VT_CABAC && vtctx->profile == H264_PROF_BASELINE) {
av_log(avctx, AV_LOG_WARNING, "CABAC entropy requires 'main' or 'high' profile, but baseline was requested. Encode will not use CABAC entropy.\n");
vtctx->entropy = VT_ENTROPY_NOT_SET;
}

if (!get_vt_profile_level(avctx, &profile_level)) return AVERROR(EINVAL);

vtctx->session = NULL;

enc_info = CFDictionaryCreateMutable(
kCFAllocatorDefault,
20,
&kCFCopyStringDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks
);

if (!enc_info) return AVERROR(ENOMEM);

#if !TARGET_OS_IPHONE
if (!vtctx->allow_sw) {
CFDictionarySetValue(enc_info, kVTVideoEncoderSpecification_RequireHardwareAcceleratedVideoEncoder, kCFBooleanTrue);
} else {
CFDictionarySetValue(enc_info, kVTVideoEncoderSpecification_EnableHardwareAcceleratedVideoEncoder, kCFBooleanTrue);
}
#endif

if (avctx->pix_fmt != AV_PIX_FMT_VIDEOTOOLBOX) {
status = create_cv_pixel_buffer_info(avctx, &pixel_buffer_info);
if (status)
goto init_cleanup;
} else {
pixel_buffer_info = NULL;
}

pthread_mutex_init(&vtctx->lock, NULL);
pthread_cond_init(&vtctx->cv_sample_sent, NULL);
vtctx->dts_delta = vtctx->has_b_frames ? -1 : 0;

get_cv_transfer_function(avctx, &vtctx->transfer_function, &gamma_level);
get_cv_ycbcr_matrix(avctx, &vtctx->ycbcr_matrix);
get_cv_color_primaries(avctx, &vtctx->color_primaries);


if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
status = vtenc_populate_extradata(avctx,
codec_type,
profile_level,
gamma_level,
enc_info,
pixel_buffer_info);
if (status)
goto init_cleanup;
}

status = vtenc_create_encoder(avctx,
codec_type,
profile_level,
gamma_level,
enc_info,
pixel_buffer_info,
&vtctx->session);

if (status < 0)
goto init_cleanup;

status = VTSessionCopyProperty(vtctx->session,
kVTCompressionPropertyKey_AllowFrameReordering,
kCFAllocatorDefault,
@@ -1083,7 +1122,16 @@ static av_cold int vtenc_init(AVCodecContext *avctx)
}
avctx->has_b_frames = vtctx->has_b_frames;

return 0;
init_cleanup:
if (gamma_level)
CFRelease(gamma_level);

if (pixel_buffer_info)
CFRelease(pixel_buffer_info);

CFRelease(enc_info);

return status;
}

static void vtenc_get_frame_info(CMSampleBufferRef buffer, bool *is_key_frame)
@@ -1753,6 +1801,114 @@ end_nopkt:
return status;
}

static int vtenc_populate_extradata(AVCodecContext *avctx,
CMVideoCodecType codec_type,
CFStringRef profile_level,
CFNumberRef gamma_level,
CFDictionaryRef enc_info,
CFDictionaryRef pixel_buffer_info)
{
VTEncContext *vtctx = avctx->priv_data;
AVFrame *frame = av_frame_alloc();
int y_size = avctx->width * avctx->height;
int chroma_size = (avctx->width / 2) * (avctx->height / 2);
CMSampleBufferRef buf = NULL;
int status;

if (!frame)
return AVERROR(ENOMEM);

frame->buf[0] = av_buffer_alloc(y_size + 2 * chroma_size);

if(!frame->buf[0]){
status = AVERROR(ENOMEM);
goto pe_cleanup;
}

status = vtenc_create_encoder(avctx,
codec_type,
profile_level,
gamma_level,
enc_info,
pixel_buffer_info,
&vtctx->session);
if (status)
goto pe_cleanup;

frame->data[0] = frame->buf[0]->data;
memset(frame->data[0], 0, y_size);

frame->data[1] = frame->buf[0]->data + y_size;
memset(frame->data[1], 128, chroma_size);


if (avctx->pix_fmt == AV_PIX_FMT_YUV420P) {
frame->data[2] = frame->buf[0]->data + y_size + chroma_size;
memset(frame->data[2], 128, chroma_size);
}

frame->linesize[0] = avctx->width;

if (avctx->pix_fmt == AV_PIX_FMT_YUV420P) {
frame->linesize[1] =
frame->linesize[2] = (avctx->width + 1) / 2;
} else {
frame->linesize[1] = (avctx->width + 1) / 2;
}

frame->format = avctx->pix_fmt;
frame->width = avctx->width;
frame->height = avctx->height;
av_frame_set_colorspace(frame, avctx->colorspace);
av_frame_set_color_range(frame, avctx->color_range);
frame->color_trc = avctx->color_trc;
frame->color_primaries = avctx->color_primaries;

frame->pts = 0;
status = vtenc_send_frame(avctx, vtctx, frame);
if (status) {
av_log(avctx, AV_LOG_ERROR, "Error sending frame: %d\n", status);
goto pe_cleanup;
}

av_log(avctx, AV_LOG_INFO, "Completing\n");

//Populates extradata - output frames are flushed and param sets are available.
status = VTCompressionSessionCompleteFrames(vtctx->session,
kCMTimeIndefinite);


av_log(avctx, AV_LOG_INFO, "Completed: %d\n", status);
if (status)
goto pe_cleanup;

status = vtenc_q_pop(vtctx, 0, &buf);
if (status) {
av_log(avctx, AV_LOG_ERROR, "popping: %d\n", status);
goto pe_cleanup;
}

CFRelease(buf);



pe_cleanup:
if(vtctx->session)
CFRelease(vtctx->session);

vtctx->session = NULL;
vtctx->frame_ct_out = 0;

av_frame_unref(frame);
av_frame_free(&frame);

av_log(avctx, AV_LOG_INFO, "status %d ed %p size %d\n", status, avctx->extradata, avctx->extradata_size);

av_assert0(status != 0 || (avctx->extradata && avctx->extradata_size > 0));

return status;
}

static av_cold int vtenc_close(AVCodecContext *avctx)
{
VTEncContext *vtctx = avctx->priv_data;


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