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FFmpeg/libavcodec/videotoolbox.c
Aman Gupta b5d56d8ef1 avcodec/videotoolbox: fix SEGV when hwaccel decoding h264 with ffmpeg.c 
Signed-off-by: Aman Gupta <aman@tmm1.net>
2017-11-28 08:50:13 -08:00

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/*
* Videotoolbox hardware acceleration
*
* copyright (c) 2012 Sebastien Zwickert
*
* This file is part of FFmpeg.
*
* FFmpeg 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 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "videotoolbox.h"
#include "libavutil/hwcontext_videotoolbox.h"
#include "vt_internal.h"
#include "libavutil/avutil.h"
#include "libavutil/hwcontext.h"
#include "bytestream.h"
#include "decode.h"
#include "h264dec.h"
#include "hevcdec.h"
#include "mpegvideo.h"
#include <TargetConditionals.h>
#ifndef kVTVideoDecoderSpecification_RequireHardwareAcceleratedVideoDecoder
# define kVTVideoDecoderSpecification_RequireHardwareAcceleratedVideoDecoder CFSTR("RequireHardwareAcceleratedVideoDecoder")
#endif
#if !HAVE_KCMVIDEOCODECTYPE_HEVC
enum { kCMVideoCodecType_HEVC = 'hvc1' };
#endif
#define VIDEOTOOLBOX_ESDS_EXTRADATA_PADDING 12
static void videotoolbox_buffer_release(void *opaque, uint8_t *data)
{
CVPixelBufferRef cv_buffer = (CVImageBufferRef)data;
CVPixelBufferRelease(cv_buffer);
}
static int videotoolbox_buffer_copy(VTContext *vtctx,
const uint8_t *buffer,
uint32_t size)
{
void *tmp;
tmp = av_fast_realloc(vtctx->bitstream,
&vtctx->allocated_size,
size);
if (!tmp)
return AVERROR(ENOMEM);
vtctx->bitstream = tmp;
memcpy(vtctx->bitstream, buffer, size);
vtctx->bitstream_size = size;
return 0;
}
int ff_videotoolbox_alloc_frame(AVCodecContext *avctx, AVFrame *frame)
{
int ret = ff_attach_decode_data(frame);
if (ret < 0)
return ret;
frame->width = avctx->width;
frame->height = avctx->height;
frame->format = avctx->pix_fmt;
frame->buf[0] = av_buffer_alloc(1);
if (!frame->buf[0])
return AVERROR(ENOMEM);
return 0;
}
#define AV_W8(p, v) *(p) = (v)
CFDataRef ff_videotoolbox_avcc_extradata_create(AVCodecContext *avctx)
{
VTContext *vtctx = avctx->internal->hwaccel_priv_data;
H264Context *h = avctx->priv_data;
CFDataRef data = NULL;
uint8_t *p;
int vt_extradata_size = 6 + 2 + h->ps.sps->data_size + 3 + h->ps.pps->data_size;
uint8_t *vt_extradata = av_malloc(vt_extradata_size);
if (!vt_extradata)
return NULL;
p = vt_extradata;
AV_W8(p + 0, 1); /* version */
AV_W8(p + 1, h->ps.sps->data[1]); /* profile */
AV_W8(p + 2, h->ps.sps->data[2]); /* profile compat */
AV_W8(p + 3, h->ps.sps->data[3]); /* level */
AV_W8(p + 4, 0xff); /* 6 bits reserved (111111) + 2 bits nal size length - 3 (11) */
AV_W8(p + 5, 0xe1); /* 3 bits reserved (111) + 5 bits number of sps (00001) */
AV_WB16(p + 6, h->ps.sps->data_size);
memcpy(p + 8, h->ps.sps->data, h->ps.sps->data_size);
p += 8 + h->ps.sps->data_size;
AV_W8(p + 0, 1); /* number of pps */
AV_WB16(p + 1, h->ps.pps->data_size);
memcpy(p + 3, h->ps.pps->data, h->ps.pps->data_size);
p += 3 + h->ps.pps->data_size;
av_assert0(p - vt_extradata == vt_extradata_size);
// save sps header (profile/level) used to create decoder session,
// so we can detect changes and recreate it.
if (vtctx)
memcpy(vtctx->sps, h->ps.sps->data + 1, 3);
data = CFDataCreate(kCFAllocatorDefault, vt_extradata, vt_extradata_size);
av_free(vt_extradata);
return data;
}
CFDataRef ff_videotoolbox_hvcc_extradata_create(AVCodecContext *avctx)
{
HEVCContext *h = avctx->priv_data;
const HEVCVPS *vps = (const HEVCVPS *)h->ps.vps_list[0]->data;
const HEVCSPS *sps = (const HEVCSPS *)h->ps.sps_list[0]->data;
int i, num_pps = 0;
const HEVCPPS *pps = h->ps.pps;
PTLCommon ptlc = vps->ptl.general_ptl;
VUI vui = sps->vui;
uint8_t parallelismType;
CFDataRef data = NULL;
uint8_t *p;
int vt_extradata_size = 23 + 5 + vps->data_size + 5 + sps->data_size + 3;
uint8_t *vt_extradata;
for (i = 0; i < HEVC_MAX_PPS_COUNT; i++) {
if (h->ps.pps_list[i]) {
const HEVCPPS *pps = (const HEVCPPS *)h->ps.pps_list[i]->data;
vt_extradata_size += 2 + pps->data_size;
num_pps++;
}
}
vt_extradata = av_malloc(vt_extradata_size);
if (!vt_extradata)
return NULL;
p = vt_extradata;
/* unsigned int(8) configurationVersion = 1; */
AV_W8(p + 0, 1);
/*
* unsigned int(2) general_profile_space;
* unsigned int(1) general_tier_flag;
* unsigned int(5) general_profile_idc;
*/
AV_W8(p + 1, ptlc.profile_space << 6 |
ptlc.tier_flag << 5 |
ptlc.profile_idc);
/* unsigned int(32) general_profile_compatibility_flags; */
memcpy(p + 2, ptlc.profile_compatibility_flag, 4);
/* unsigned int(48) general_constraint_indicator_flags; */
AV_W8(p + 6, ptlc.progressive_source_flag << 7 |
ptlc.interlaced_source_flag << 6 |
ptlc.non_packed_constraint_flag << 5 |
ptlc.frame_only_constraint_flag << 4);
AV_W8(p + 7, 0);
AV_WN32(p + 8, 0);
/* unsigned int(8) general_level_idc; */
AV_W8(p + 12, ptlc.level_idc);
/*
* bit(4) reserved = ‘1111’b;
* unsigned int(12) min_spatial_segmentation_idc;
*/
AV_W8(p + 13, 0xf0 | (vui.min_spatial_segmentation_idc >> 4));
AV_W8(p + 14, vui.min_spatial_segmentation_idc & 0xff);
/*
* bit(6) reserved = ‘111111’b;
* unsigned int(2) parallelismType;
*/
if (!vui.min_spatial_segmentation_idc)
parallelismType = 0;
else if (pps->entropy_coding_sync_enabled_flag && pps->tiles_enabled_flag)
parallelismType = 0;
else if (pps->entropy_coding_sync_enabled_flag)
parallelismType = 3;
else if (pps->tiles_enabled_flag)
parallelismType = 2;
else
parallelismType = 1;
AV_W8(p + 15, 0xfc | parallelismType);
/*
* bit(6) reserved = ‘111111’b;
* unsigned int(2) chromaFormat;
*/
AV_W8(p + 16, sps->chroma_format_idc | 0xfc);
/*
* bit(5) reserved = ‘11111’b;
* unsigned int(3) bitDepthLumaMinus8;
*/
AV_W8(p + 17, (sps->bit_depth - 8) | 0xfc);
/*
* bit(5) reserved = ‘11111’b;
* unsigned int(3) bitDepthChromaMinus8;
*/
AV_W8(p + 18, (sps->bit_depth_chroma - 8) | 0xfc);
/* bit(16) avgFrameRate; */
AV_WB16(p + 19, 0);
/*
* bit(2) constantFrameRate;
* bit(3) numTemporalLayers;
* bit(1) temporalIdNested;
* unsigned int(2) lengthSizeMinusOne;
*/
AV_W8(p + 21, 0 << 6 |
sps->max_sub_layers << 3 |
sps->temporal_id_nesting_flag << 2 |
3);
/* unsigned int(8) numOfArrays; */
AV_W8(p + 22, 3);
p += 23;
/* vps */
/*
* bit(1) array_completeness;
* unsigned int(1) reserved = 0;
* unsigned int(6) NAL_unit_type;
*/
AV_W8(p, 1 << 7 |
HEVC_NAL_VPS & 0x3f);
/* unsigned int(16) numNalus; */
AV_WB16(p + 1, 1);
/* unsigned int(16) nalUnitLength; */
AV_WB16(p + 3, vps->data_size);
/* bit(8*nalUnitLength) nalUnit; */
memcpy(p + 5, vps->data, vps->data_size);
p += 5 + vps->data_size;
/* sps */
AV_W8(p, 1 << 7 |
HEVC_NAL_SPS & 0x3f);
AV_WB16(p + 1, 1);
AV_WB16(p + 3, sps->data_size);
memcpy(p + 5, sps->data, sps->data_size);
p += 5 + sps->data_size;
/* pps */
AV_W8(p, 1 << 7 |
HEVC_NAL_PPS & 0x3f);
AV_WB16(p + 1, num_pps);
p += 3;
for (i = 0; i < HEVC_MAX_PPS_COUNT; i++) {
if (h->ps.pps_list[i]) {
const HEVCPPS *pps = (const HEVCPPS *)h->ps.pps_list[i]->data;
AV_WB16(p, pps->data_size);
memcpy(p + 2, pps->data, pps->data_size);
p += 2 + pps->data_size;
}
}
av_assert0(p - vt_extradata == vt_extradata_size);
data = CFDataCreate(kCFAllocatorDefault, vt_extradata, vt_extradata_size);
av_free(vt_extradata);
return data;
}
int ff_videotoolbox_buffer_create(VTContext *vtctx, AVFrame *frame)
{
av_buffer_unref(&frame->buf[0]);
frame->buf[0] = av_buffer_create((uint8_t*)vtctx->frame,
sizeof(vtctx->frame),
videotoolbox_buffer_release,
NULL,
AV_BUFFER_FLAG_READONLY);
if (!frame->buf[0]) {
return AVERROR(ENOMEM);
}
frame->data[3] = (uint8_t*)vtctx->frame;
vtctx->frame = NULL;
return 0;
}
int ff_videotoolbox_h264_start_frame(AVCodecContext *avctx,
const uint8_t *buffer,
uint32_t size)
{
VTContext *vtctx = avctx->internal->hwaccel_priv_data;
H264Context *h = avctx->priv_data;
if (h->is_avc == 1) {
return videotoolbox_buffer_copy(vtctx, buffer, size);
}
return 0;
}
static int videotoolbox_h264_decode_params(AVCodecContext *avctx,
int type,
const uint8_t *buffer,
uint32_t size)
{
VTContext *vtctx = avctx->internal->hwaccel_priv_data;
H264Context *h = avctx->priv_data;
// save sps header (profile/level) used to create decoder session
if (!vtctx->sps[0])
memcpy(vtctx->sps, h->ps.sps->data + 1, 3);
if (type == H264_NAL_SPS) {
if (size > 4 && memcmp(vtctx->sps, buffer + 1, 3) != 0) {
vtctx->reconfig_needed = true;
memcpy(vtctx->sps, buffer + 1, 3);
}
}
// pass-through SPS/PPS changes to the decoder
return ff_videotoolbox_h264_decode_slice(avctx, buffer, size);
}
int ff_videotoolbox_h264_decode_slice(AVCodecContext *avctx,
const uint8_t *buffer,
uint32_t size)
{
VTContext *vtctx = avctx->internal->hwaccel_priv_data;
H264Context *h = avctx->priv_data;
void *tmp;
if (h->is_avc == 1)
return 0;
tmp = av_fast_realloc(vtctx->bitstream,
&vtctx->allocated_size,
vtctx->bitstream_size+size+4);
if (!tmp)
return AVERROR(ENOMEM);
vtctx->bitstream = tmp;
AV_WB32(vtctx->bitstream + vtctx->bitstream_size, size);
memcpy(vtctx->bitstream + vtctx->bitstream_size + 4, buffer, size);
vtctx->bitstream_size += size + 4;
return 0;
}
int ff_videotoolbox_uninit(AVCodecContext *avctx)
{
VTContext *vtctx = avctx->internal->hwaccel_priv_data;
if (vtctx) {
av_freep(&vtctx->bitstream);
if (vtctx->frame)
CVPixelBufferRelease(vtctx->frame);
}
return 0;
}
#if CONFIG_VIDEOTOOLBOX
// Return the AVVideotoolboxContext that matters currently. Where it comes from
// depends on the API used.
static AVVideotoolboxContext *videotoolbox_get_context(AVCodecContext *avctx)
{
// Somewhat tricky because the user can call av_videotoolbox_default_free()
// at any time, even when the codec is closed.
if (avctx->internal && avctx->internal->hwaccel_priv_data) {
VTContext *vtctx = avctx->internal->hwaccel_priv_data;
if (vtctx->vt_ctx)
return vtctx->vt_ctx;
}
return avctx->hwaccel_context;
}
static int videotoolbox_buffer_create(AVCodecContext *avctx, AVFrame *frame)
{
VTContext *vtctx = avctx->internal->hwaccel_priv_data;
CVPixelBufferRef pixbuf = (CVPixelBufferRef)vtctx->frame;
OSType pixel_format = CVPixelBufferGetPixelFormatType(pixbuf);
enum AVPixelFormat sw_format = av_map_videotoolbox_format_to_pixfmt(pixel_format);
int width = CVPixelBufferGetWidth(pixbuf);
int height = CVPixelBufferGetHeight(pixbuf);
AVHWFramesContext *cached_frames;
int ret;
ret = ff_videotoolbox_buffer_create(vtctx, frame);
if (ret < 0)
return ret;
// Old API code path.
if (!vtctx->cached_hw_frames_ctx)
return 0;
cached_frames = (AVHWFramesContext*)vtctx->cached_hw_frames_ctx->data;
if (cached_frames->sw_format != sw_format ||
cached_frames->width != width ||
cached_frames->height != height) {
AVBufferRef *hw_frames_ctx = av_hwframe_ctx_alloc(cached_frames->device_ref);
AVHWFramesContext *hw_frames;
if (!hw_frames_ctx)
return AVERROR(ENOMEM);
hw_frames = (AVHWFramesContext*)hw_frames_ctx->data;
hw_frames->format = cached_frames->format;
hw_frames->sw_format = sw_format;
hw_frames->width = width;
hw_frames->height = height;
ret = av_hwframe_ctx_init(hw_frames_ctx);
if (ret < 0) {
av_buffer_unref(&hw_frames_ctx);
return ret;
}
av_buffer_unref(&vtctx->cached_hw_frames_ctx);
vtctx->cached_hw_frames_ctx = hw_frames_ctx;
}
av_buffer_unref(&frame->hw_frames_ctx);
frame->hw_frames_ctx = av_buffer_ref(vtctx->cached_hw_frames_ctx);
if (!frame->hw_frames_ctx)
return AVERROR(ENOMEM);
return 0;
}
static void videotoolbox_write_mp4_descr_length(PutByteContext *pb, int length)
{
int i;
uint8_t b;
for (i = 3; i >= 0; i--) {
b = (length >> (i * 7)) & 0x7F;
if (i != 0)
b |= 0x80;
bytestream2_put_byteu(pb, b);
}
}
static CFDataRef videotoolbox_esds_extradata_create(AVCodecContext *avctx)
{
CFDataRef data;
uint8_t *rw_extradata;
PutByteContext pb;
int full_size = 3 + 5 + 13 + 5 + avctx->extradata_size + 3;
// ES_DescrTag data + DecoderConfigDescrTag + data + DecSpecificInfoTag + size + SLConfigDescriptor
int config_size = 13 + 5 + avctx->extradata_size;
int s;
if (!(rw_extradata = av_mallocz(full_size + VIDEOTOOLBOX_ESDS_EXTRADATA_PADDING)))
return NULL;
bytestream2_init_writer(&pb, rw_extradata, full_size + VIDEOTOOLBOX_ESDS_EXTRADATA_PADDING);
bytestream2_put_byteu(&pb, 0); // version
bytestream2_put_ne24(&pb, 0); // flags
// elementary stream descriptor
bytestream2_put_byteu(&pb, 0x03); // ES_DescrTag
videotoolbox_write_mp4_descr_length(&pb, full_size);
bytestream2_put_ne16(&pb, 0); // esid
bytestream2_put_byteu(&pb, 0); // stream priority (0-32)
// decoder configuration descriptor
bytestream2_put_byteu(&pb, 0x04); // DecoderConfigDescrTag
videotoolbox_write_mp4_descr_length(&pb, config_size);
bytestream2_put_byteu(&pb, 32); // object type indication. 32 = AV_CODEC_ID_MPEG4
bytestream2_put_byteu(&pb, 0x11); // stream type
bytestream2_put_ne24(&pb, 0); // buffer size
bytestream2_put_ne32(&pb, 0); // max bitrate
bytestream2_put_ne32(&pb, 0); // avg bitrate
// decoder specific descriptor
bytestream2_put_byteu(&pb, 0x05); ///< DecSpecificInfoTag
videotoolbox_write_mp4_descr_length(&pb, avctx->extradata_size);
bytestream2_put_buffer(&pb, avctx->extradata, avctx->extradata_size);
// SLConfigDescriptor
bytestream2_put_byteu(&pb, 0x06); // SLConfigDescrTag
bytestream2_put_byteu(&pb, 0x01); // length
bytestream2_put_byteu(&pb, 0x02); //
s = bytestream2_size_p(&pb);
data = CFDataCreate(kCFAllocatorDefault, rw_extradata, s);
av_freep(&rw_extradata);
return data;
}
static CMSampleBufferRef videotoolbox_sample_buffer_create(CMFormatDescriptionRef fmt_desc,
void *buffer,
int size)
{
OSStatus status;
CMBlockBufferRef block_buf;
CMSampleBufferRef sample_buf;
block_buf = NULL;
sample_buf = NULL;
status = CMBlockBufferCreateWithMemoryBlock(kCFAllocatorDefault,// structureAllocator
buffer, // memoryBlock
size, // blockLength
kCFAllocatorNull, // blockAllocator
NULL, // customBlockSource
0, // offsetToData
size, // dataLength
0, // flags
&block_buf);
if (!status) {
status = CMSampleBufferCreate(kCFAllocatorDefault, // allocator
block_buf, // dataBuffer
TRUE, // dataReady
0, // makeDataReadyCallback
0, // makeDataReadyRefcon
fmt_desc, // formatDescription
1, // numSamples
0, // numSampleTimingEntries
NULL, // sampleTimingArray
0, // numSampleSizeEntries
NULL, // sampleSizeArray
&sample_buf);
}
if (block_buf)
CFRelease(block_buf);
return sample_buf;
}
static void videotoolbox_decoder_callback(void *opaque,
void *sourceFrameRefCon,
OSStatus status,
VTDecodeInfoFlags flags,
CVImageBufferRef image_buffer,
CMTime pts,
CMTime duration)
{
AVCodecContext *avctx = opaque;
VTContext *vtctx = avctx->internal->hwaccel_priv_data;
if (vtctx->frame) {
CVPixelBufferRelease(vtctx->frame);
vtctx->frame = NULL;
}
if (!image_buffer) {
av_log(NULL, AV_LOG_DEBUG, "vt decoder cb: output image buffer is null\n");
return;
}
vtctx->frame = CVPixelBufferRetain(image_buffer);
}
static OSStatus videotoolbox_session_decode_frame(AVCodecContext *avctx)
{
OSStatus status;
CMSampleBufferRef sample_buf;
AVVideotoolboxContext *videotoolbox = videotoolbox_get_context(avctx);
VTContext *vtctx = avctx->internal->hwaccel_priv_data;
sample_buf = videotoolbox_sample_buffer_create(videotoolbox->cm_fmt_desc,
vtctx->bitstream,
vtctx->bitstream_size);
if (!sample_buf)
return -1;
status = VTDecompressionSessionDecodeFrame(videotoolbox->session,
sample_buf,
0, // decodeFlags
NULL, // sourceFrameRefCon
0); // infoFlagsOut
if (status == noErr)
status = VTDecompressionSessionWaitForAsynchronousFrames(videotoolbox->session);
CFRelease(sample_buf);
return status;
}
static CMVideoFormatDescriptionRef videotoolbox_format_desc_create(CMVideoCodecType codec_type,
CFDictionaryRef decoder_spec,
int width,
int height)
{
CMFormatDescriptionRef cm_fmt_desc;
OSStatus status;
status = CMVideoFormatDescriptionCreate(kCFAllocatorDefault,
codec_type,
width,
height,
decoder_spec, // Dictionary of extension
&cm_fmt_desc);
if (status)
return NULL;
return cm_fmt_desc;
}
static CFDictionaryRef videotoolbox_buffer_attributes_create(int width,
int height,
OSType pix_fmt)
{
CFMutableDictionaryRef buffer_attributes;
CFMutableDictionaryRef io_surface_properties;
CFNumberRef cv_pix_fmt;
CFNumberRef w;
CFNumberRef h;
w = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &width);
h = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &height);
cv_pix_fmt = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &pix_fmt);
buffer_attributes = CFDictionaryCreateMutable(kCFAllocatorDefault,
4,
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
io_surface_properties = CFDictionaryCreateMutable(kCFAllocatorDefault,
0,
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
if (pix_fmt)
CFDictionarySetValue(buffer_attributes, kCVPixelBufferPixelFormatTypeKey, cv_pix_fmt);
CFDictionarySetValue(buffer_attributes, kCVPixelBufferIOSurfacePropertiesKey, io_surface_properties);
CFDictionarySetValue(buffer_attributes, kCVPixelBufferWidthKey, w);
CFDictionarySetValue(buffer_attributes, kCVPixelBufferHeightKey, h);
#if TARGET_OS_IPHONE
CFDictionarySetValue(buffer_attributes, kCVPixelBufferOpenGLESCompatibilityKey, kCFBooleanTrue);
#else
CFDictionarySetValue(buffer_attributes, kCVPixelBufferIOSurfaceOpenGLTextureCompatibilityKey, kCFBooleanTrue);
#endif
CFRelease(io_surface_properties);
CFRelease(cv_pix_fmt);
CFRelease(w);
CFRelease(h);
return buffer_attributes;
}
static CFDictionaryRef videotoolbox_decoder_config_create(CMVideoCodecType codec_type,
AVCodecContext *avctx)
{
CFMutableDictionaryRef config_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
0,
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
CFDictionarySetValue(config_info,
kVTVideoDecoderSpecification_RequireHardwareAcceleratedVideoDecoder,
kCFBooleanTrue);
CFMutableDictionaryRef avc_info;
CFDataRef data = NULL;
avc_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
1,
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
switch (codec_type) {
case kCMVideoCodecType_MPEG4Video :
if (avctx->extradata_size)
data = videotoolbox_esds_extradata_create(avctx);
if (data)
CFDictionarySetValue(avc_info, CFSTR("esds"), data);
break;
case kCMVideoCodecType_H264 :
data = ff_videotoolbox_avcc_extradata_create(avctx);
if (data)
CFDictionarySetValue(avc_info, CFSTR("avcC"), data);
break;
case kCMVideoCodecType_HEVC :
data = ff_videotoolbox_hvcc_extradata_create(avctx);
if (data)
CFDictionarySetValue(avc_info, CFSTR("hvcC"), data);
break;
default:
break;
}
CFDictionarySetValue(config_info,
kCMFormatDescriptionExtension_SampleDescriptionExtensionAtoms,
avc_info);
if (data)
CFRelease(data);
CFRelease(avc_info);
return config_info;
}
static int videotoolbox_start(AVCodecContext *avctx)
{
AVVideotoolboxContext *videotoolbox = videotoolbox_get_context(avctx);
OSStatus status;
VTDecompressionOutputCallbackRecord decoder_cb;
CFDictionaryRef decoder_spec;
CFDictionaryRef buf_attr;
if (!videotoolbox) {
av_log(avctx, AV_LOG_ERROR, "hwaccel context is not set\n");
return -1;
}
switch( avctx->codec_id ) {
case AV_CODEC_ID_H263 :
videotoolbox->cm_codec_type = kCMVideoCodecType_H263;
break;
case AV_CODEC_ID_H264 :
videotoolbox->cm_codec_type = kCMVideoCodecType_H264;
break;
case AV_CODEC_ID_HEVC :
videotoolbox->cm_codec_type = kCMVideoCodecType_HEVC;
break;
case AV_CODEC_ID_MPEG1VIDEO :
videotoolbox->cm_codec_type = kCMVideoCodecType_MPEG1Video;
break;
case AV_CODEC_ID_MPEG2VIDEO :
videotoolbox->cm_codec_type = kCMVideoCodecType_MPEG2Video;
break;
case AV_CODEC_ID_MPEG4 :
videotoolbox->cm_codec_type = kCMVideoCodecType_MPEG4Video;
break;
default :
break;
}
decoder_spec = videotoolbox_decoder_config_create(videotoolbox->cm_codec_type, avctx);
if (!decoder_spec) {
av_log(avctx, AV_LOG_ERROR, "decoder specification creation failed\n");
return -1;
}
videotoolbox->cm_fmt_desc = videotoolbox_format_desc_create(videotoolbox->cm_codec_type,
decoder_spec,
avctx->width,
avctx->height);
if (!videotoolbox->cm_fmt_desc) {
if (decoder_spec)
CFRelease(decoder_spec);
av_log(avctx, AV_LOG_ERROR, "format description creation failed\n");
return -1;
}
buf_attr = videotoolbox_buffer_attributes_create(avctx->width,
avctx->height,
videotoolbox->cv_pix_fmt_type);
decoder_cb.decompressionOutputCallback = videotoolbox_decoder_callback;
decoder_cb.decompressionOutputRefCon = avctx;
status = VTDecompressionSessionCreate(NULL, // allocator
videotoolbox->cm_fmt_desc, // videoFormatDescription
decoder_spec, // videoDecoderSpecification
buf_attr, // destinationImageBufferAttributes
&decoder_cb, // outputCallback
&videotoolbox->session); // decompressionSessionOut
if (decoder_spec)
CFRelease(decoder_spec);
if (buf_attr)
CFRelease(buf_attr);
switch (status) {
case kVTVideoDecoderNotAvailableNowErr:
av_log(avctx, AV_LOG_VERBOSE, "VideoToolbox session not available.\n");
return AVERROR(ENOSYS);
case kVTVideoDecoderUnsupportedDataFormatErr:
av_log(avctx, AV_LOG_VERBOSE, "VideoToolbox does not support this format.\n");
return AVERROR(ENOSYS);
case kVTVideoDecoderMalfunctionErr:
av_log(avctx, AV_LOG_VERBOSE, "VideoToolbox malfunction.\n");
return AVERROR(EINVAL);
case kVTVideoDecoderBadDataErr:
av_log(avctx, AV_LOG_VERBOSE, "VideoToolbox reported invalid data.\n");
return AVERROR_INVALIDDATA;
case 0:
return 0;
default:
av_log(avctx, AV_LOG_VERBOSE, "Unknown VideoToolbox session creation error %u\n", (unsigned)status);
return AVERROR_UNKNOWN;
}
}
static void videotoolbox_stop(AVCodecContext *avctx)
{
AVVideotoolboxContext *videotoolbox = videotoolbox_get_context(avctx);
if (!videotoolbox)
return;
if (videotoolbox->cm_fmt_desc) {
CFRelease(videotoolbox->cm_fmt_desc);
videotoolbox->cm_fmt_desc = NULL;
}
if (videotoolbox->session) {
VTDecompressionSessionInvalidate(videotoolbox->session);
CFRelease(videotoolbox->session);
videotoolbox->session = NULL;
}
}
static const char *videotoolbox_error_string(OSStatus status)
{
switch (status) {
case kVTVideoDecoderBadDataErr:
return "bad data";
case kVTVideoDecoderMalfunctionErr:
return "decoder malfunction";
case kVTInvalidSessionErr:
return "invalid session";
}
return "unknown";
}
static int videotoolbox_common_end_frame(AVCodecContext *avctx, AVFrame *frame)
{
OSStatus status;
AVVideotoolboxContext *videotoolbox = videotoolbox_get_context(avctx);
VTContext *vtctx = avctx->internal->hwaccel_priv_data;
if (vtctx->reconfig_needed == true) {
vtctx->reconfig_needed = false;
av_log(avctx, AV_LOG_VERBOSE, "VideoToolbox decoder needs reconfig, restarting..\n");
videotoolbox_stop(avctx);
if (videotoolbox_start(avctx) != 0) {
return AVERROR_EXTERNAL;
}
}
if (!videotoolbox->session || !vtctx->bitstream || !vtctx->bitstream_size)
return AVERROR_INVALIDDATA;
status = videotoolbox_session_decode_frame(avctx);
if (status != noErr) {
if (status == kVTVideoDecoderMalfunctionErr || status == kVTInvalidSessionErr)
vtctx->reconfig_needed = true;
av_log(avctx, AV_LOG_ERROR, "Failed to decode frame (%s, %d)\n", videotoolbox_error_string(status), (int)status);
return AVERROR_UNKNOWN;
}
if (!vtctx->frame) {
vtctx->reconfig_needed = true;
return AVERROR_UNKNOWN;
}
return videotoolbox_buffer_create(avctx, frame);
}
static int videotoolbox_h264_end_frame(AVCodecContext *avctx)
{
H264Context *h = avctx->priv_data;
AVFrame *frame = h->cur_pic_ptr->f;
VTContext *vtctx = avctx->internal->hwaccel_priv_data;
int ret = videotoolbox_common_end_frame(avctx, frame);
vtctx->bitstream_size = 0;
return ret;
}
static int videotoolbox_hevc_decode_params(AVCodecContext *avctx,
int type,
const uint8_t *buffer,
uint32_t size)
{
return ff_videotoolbox_h264_decode_slice(avctx, buffer, size);
}
static int videotoolbox_hevc_end_frame(AVCodecContext *avctx)
{
HEVCContext *h = avctx->priv_data;
AVFrame *frame = h->ref->frame;
VTContext *vtctx = avctx->internal->hwaccel_priv_data;
int ret;
ret = videotoolbox_common_end_frame(avctx, frame);
vtctx->bitstream_size = 0;
return ret;
}
static int videotoolbox_mpeg_start_frame(AVCodecContext *avctx,
const uint8_t *buffer,
uint32_t size)
{
VTContext *vtctx = avctx->internal->hwaccel_priv_data;
return videotoolbox_buffer_copy(vtctx, buffer, size);
}
static int videotoolbox_mpeg_decode_slice(AVCodecContext *avctx,
const uint8_t *buffer,
uint32_t size)
{
return 0;
}
static int videotoolbox_mpeg_end_frame(AVCodecContext *avctx)
{
MpegEncContext *s = avctx->priv_data;
AVFrame *frame = s->current_picture_ptr->f;
return videotoolbox_common_end_frame(avctx, frame);
}
static int videotoolbox_uninit(AVCodecContext *avctx)
{
VTContext *vtctx = avctx->internal->hwaccel_priv_data;
if (!vtctx)
return 0;
ff_videotoolbox_uninit(avctx);
if (vtctx->vt_ctx)
videotoolbox_stop(avctx);
av_buffer_unref(&vtctx->cached_hw_frames_ctx);
av_freep(&vtctx->vt_ctx);
return 0;
}
static int videotoolbox_common_init(AVCodecContext *avctx)
{
VTContext *vtctx = avctx->internal->hwaccel_priv_data;
AVHWFramesContext *hw_frames;
int err;
// Old API - do nothing.
if (avctx->hwaccel_context)
return 0;
if (!avctx->hw_frames_ctx && !avctx->hw_device_ctx) {
av_log(avctx, AV_LOG_ERROR,
"Either hw_frames_ctx or hw_device_ctx must be set.\n");
return AVERROR(EINVAL);
}
vtctx->vt_ctx = av_videotoolbox_alloc_context();
if (!vtctx->vt_ctx) {
err = AVERROR(ENOMEM);
goto fail;
}
if (avctx->hw_frames_ctx) {
hw_frames = (AVHWFramesContext*)avctx->hw_frames_ctx->data;
} else {
avctx->hw_frames_ctx = av_hwframe_ctx_alloc(avctx->hw_device_ctx);
if (!avctx->hw_frames_ctx) {
err = AVERROR(ENOMEM);
goto fail;
}
hw_frames = (AVHWFramesContext*)avctx->hw_frames_ctx->data;
hw_frames->format = AV_PIX_FMT_VIDEOTOOLBOX;
hw_frames->sw_format = AV_PIX_FMT_NV12; // same as av_videotoolbox_alloc_context()
hw_frames->width = avctx->width;
hw_frames->height = avctx->height;
err = av_hwframe_ctx_init(avctx->hw_frames_ctx);
if (err < 0) {
av_buffer_unref(&avctx->hw_frames_ctx);
goto fail;
}
}
vtctx->cached_hw_frames_ctx = av_buffer_ref(avctx->hw_frames_ctx);
if (!vtctx->cached_hw_frames_ctx) {
err = AVERROR(ENOMEM);
goto fail;
}
vtctx->vt_ctx->cv_pix_fmt_type =
av_map_videotoolbox_format_from_pixfmt(hw_frames->sw_format);
if (!vtctx->vt_ctx->cv_pix_fmt_type) {
av_log(avctx, AV_LOG_ERROR, "Unknown sw_format.\n");
err = AVERROR(EINVAL);
goto fail;
}
err = videotoolbox_start(avctx);
if (err < 0)
goto fail;
return 0;
fail:
videotoolbox_uninit(avctx);
return err;
}
static int videotoolbox_frame_params(AVCodecContext *avctx,
AVBufferRef *hw_frames_ctx)
{
AVHWFramesContext *frames_ctx = (AVHWFramesContext*)hw_frames_ctx->data;
frames_ctx->format = AV_PIX_FMT_VIDEOTOOLBOX;
frames_ctx->width = avctx->coded_width;
frames_ctx->height = avctx->coded_height;
frames_ctx->sw_format = AV_PIX_FMT_NV12;
return 0;
}
const AVHWAccel ff_h263_videotoolbox_hwaccel = {
.name = "h263_videotoolbox",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_H263,
.pix_fmt = AV_PIX_FMT_VIDEOTOOLBOX,
.alloc_frame = ff_videotoolbox_alloc_frame,
.start_frame = videotoolbox_mpeg_start_frame,
.decode_slice = videotoolbox_mpeg_decode_slice,
.end_frame = videotoolbox_mpeg_end_frame,
.frame_params = videotoolbox_frame_params,
.init = videotoolbox_common_init,
.uninit = videotoolbox_uninit,
.priv_data_size = sizeof(VTContext),
};
const AVHWAccel ff_hevc_videotoolbox_hwaccel = {
.name = "hevc_videotoolbox",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_HEVC,
.pix_fmt = AV_PIX_FMT_VIDEOTOOLBOX,
.alloc_frame = ff_videotoolbox_alloc_frame,
.start_frame = ff_videotoolbox_h264_start_frame,
.decode_slice = ff_videotoolbox_h264_decode_slice,
.decode_params = videotoolbox_hevc_decode_params,
.end_frame = videotoolbox_hevc_end_frame,
.frame_params = videotoolbox_frame_params,
.init = videotoolbox_common_init,
.uninit = ff_videotoolbox_uninit,
.priv_data_size = sizeof(VTContext),
};
const AVHWAccel ff_h264_videotoolbox_hwaccel = {
.name = "h264_videotoolbox",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_H264,
.pix_fmt = AV_PIX_FMT_VIDEOTOOLBOX,
.alloc_frame = ff_videotoolbox_alloc_frame,
.start_frame = ff_videotoolbox_h264_start_frame,
.decode_slice = ff_videotoolbox_h264_decode_slice,
.decode_params = videotoolbox_h264_decode_params,
.end_frame = videotoolbox_h264_end_frame,
.frame_params = videotoolbox_frame_params,
.init = videotoolbox_common_init,
.uninit = videotoolbox_uninit,
.priv_data_size = sizeof(VTContext),
};
const AVHWAccel ff_mpeg1_videotoolbox_hwaccel = {
.name = "mpeg1_videotoolbox",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_MPEG1VIDEO,
.pix_fmt = AV_PIX_FMT_VIDEOTOOLBOX,
.alloc_frame = ff_videotoolbox_alloc_frame,
.start_frame = videotoolbox_mpeg_start_frame,
.decode_slice = videotoolbox_mpeg_decode_slice,
.end_frame = videotoolbox_mpeg_end_frame,
.frame_params = videotoolbox_frame_params,
.init = videotoolbox_common_init,
.uninit = videotoolbox_uninit,
.priv_data_size = sizeof(VTContext),
};
const AVHWAccel ff_mpeg2_videotoolbox_hwaccel = {
.name = "mpeg2_videotoolbox",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_MPEG2VIDEO,
.pix_fmt = AV_PIX_FMT_VIDEOTOOLBOX,
.alloc_frame = ff_videotoolbox_alloc_frame,
.start_frame = videotoolbox_mpeg_start_frame,
.decode_slice = videotoolbox_mpeg_decode_slice,
.end_frame = videotoolbox_mpeg_end_frame,
.frame_params = videotoolbox_frame_params,
.init = videotoolbox_common_init,
.uninit = videotoolbox_uninit,
.priv_data_size = sizeof(VTContext),
};
const AVHWAccel ff_mpeg4_videotoolbox_hwaccel = {
.name = "mpeg4_videotoolbox",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_MPEG4,
.pix_fmt = AV_PIX_FMT_VIDEOTOOLBOX,
.alloc_frame = ff_videotoolbox_alloc_frame,
.start_frame = videotoolbox_mpeg_start_frame,
.decode_slice = videotoolbox_mpeg_decode_slice,
.end_frame = videotoolbox_mpeg_end_frame,
.frame_params = videotoolbox_frame_params,
.init = videotoolbox_common_init,
.uninit = videotoolbox_uninit,
.priv_data_size = sizeof(VTContext),
};
AVVideotoolboxContext *av_videotoolbox_alloc_context(void)
{
AVVideotoolboxContext *ret = av_mallocz(sizeof(*ret));
if (ret) {
ret->output_callback = videotoolbox_decoder_callback;
ret->cv_pix_fmt_type = kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange;
}
return ret;
}
int av_videotoolbox_default_init(AVCodecContext *avctx)
{
return av_videotoolbox_default_init2(avctx, NULL);
}
int av_videotoolbox_default_init2(AVCodecContext *avctx, AVVideotoolboxContext *vtctx)
{
avctx->hwaccel_context = vtctx ?: av_videotoolbox_alloc_context();
if (!avctx->hwaccel_context)
return AVERROR(ENOMEM);
return videotoolbox_start(avctx);
}
void av_videotoolbox_default_free(AVCodecContext *avctx)
{
videotoolbox_stop(avctx);
av_freep(&avctx->hwaccel_context);
}
#endif /* CONFIG_VIDEOTOOLBOX */
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