Autodetected by default. Encode using -codec:v vtenc.
Signed-off-by: Rick Kern <ker...@gmail.com>
---
MAINTAINERS | 1 +
configure | 5 +
libavcodec/Makefile | 1 +
libavcodec/allcodecs.c | 1 +
libavcodec/vtenc.c | 1162 ++++++++++++++++++++++++++++++++++++++++++++++++
5 files changed, 1170 insertions(+)
create mode 100644 libavcodec/vtenc.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 0705a69..a6a5fcf 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -289,6 +289,7 @@ Codecs:
vp8 David Conrad, Jason Garrett-Glaser,
Ronald Bultje
vp9 Ronald Bultje, Clément Bœsch
vqavideo.c Mike Melanson
+ vtenc.c Rick Kern
wavpack.c Kostya Shishkov
wmaprodec.c Sascha Sommer
wmavoice.c Ronald S. Bultje
diff --git a/configure b/configure
index 6d815cc..5cc4422 100755
--- a/configure
+++ b/configure
@@ -287,6 +287,7 @@ External library support:
--disable-sdl disable sdl [autodetect]
--disable-securetransport disable Secure Transport, needed for TLS support
on OSX if openssl and gnutls are not used
[autodetect]
+ --disable-vtenc disable VideoToolbox encoder [autodetect]
--enable-x11grab enable X11 grabbing (legacy) [no]
--disable-xlib disable xlib [autodetect]
--disable-zlib disable zlib [autodetect]
@@ -1505,6 +1506,7 @@ EXTERNAL_LIBRARY_LIST="
schannel
sdl
securetransport
+ vtenc
x11grab
xlib
zlib
@@ -2661,6 +2663,7 @@ libzvbi_teletext_decoder_deps="libzvbi"
nvenc_encoder_deps="nvenc"
nvenc_h264_encoder_deps="nvenc"
nvenc_hevc_encoder_deps="nvenc"
+vtenc_encoder_deps="vtenc"
# demuxers / muxers
ac3_demuxer_select="ac3_parser"
@@ -5600,6 +5603,8 @@ enabled openssl && { use_pkg_config openssl
openssl/ssl.h SSL_library_
die "ERROR: openssl not found"; }
enabled qtkit_indev && { check_header_objcc QTKit/QTKit.h || disable
qtkit_indev; }
+disabled vtenc || { require VideoToolbox VideoToolbox/VTCompressionSession.h
VTCompressionSessionPrepareToEncodeFrames -framework VideoToolbox && enable
vtenc; }
+
# libdc1394 check
if enabled libdc1394; then
{ require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new &&
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index baffb29..f899344 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -119,6 +119,7 @@ OBJS-$(CONFIG_TEXTUREDSP) += texturedsp.o
OBJS-$(CONFIG_TEXTUREDSPENC) += texturedspenc.o
OBJS-$(CONFIG_TPELDSP) += tpeldsp.o
OBJS-$(CONFIG_VIDEODSP) += videodsp.o
+OBJS-$(CONFIG_VTENC) += vtenc.o
OBJS-$(CONFIG_VP3DSP) += vp3dsp.o
OBJS-$(CONFIG_VP56DSP) += vp56dsp.o
OBJS-$(CONFIG_VP8DSP) += vp8dsp.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 2097db0..29724bb 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -610,6 +610,7 @@ void avcodec_register_all(void)
REGISTER_ENCODER(HEVC_QSV, hevc_qsv);
REGISTER_ENCODER(LIBKVAZAAR, libkvazaar);
REGISTER_ENCODER(MPEG2_QSV, mpeg2_qsv);
+ REGISTER_ENCODER(VTENC, vtenc);
/* parsers */
REGISTER_PARSER(AAC, aac);
diff --git a/libavcodec/vtenc.c b/libavcodec/vtenc.c
new file mode 100644
index 0000000..2de8bcb
--- /dev/null
+++ b/libavcodec/vtenc.c
@@ -0,0 +1,1162 @@
+/*
+ * copyright (c) 2015 Rick Kern <ker...@gmail.com>
+ *
+ * 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 <VideoToolbox/VideoToolbox.h>
+#include <CoreVideo/CoreVideo.h>
+#include <CoreMedia/CoreMedia.h>
+#include <TargetConditionals.h>
+#include <Availability.h>
+#include "avcodec.h"
+#include "libavutil/opt.h"
+#include "libavutil/avassert.h"
+#include "libavutil/atomic.h"
+#include "libavutil/avstring.h"
+#include "libavcodec/avcodec.h"
+#include "internal.h"
+#include <pthread.h>
+
+
+static const uint8_t start_code[] = { 0, 0, 0, 1 };
+
+typedef struct BufNode {
+ CMSampleBufferRef cm_buffer;
+ struct BufNode* next;
+ int error;
+} BufNode;
+
+typedef struct VTEncContext {
+ AVClass *class;
+ VTCompressionSessionRef session;
+
+ pthread_mutex_t lock;
+ pthread_cond_t cv_sample_sent;
+
+ int async_error;
+
+ BufNode *q_head;
+ BufNode *q_tail;
+
+ int64_t frame_ct_out;
+ int64_t frame_ct_in;
+
+ int64_t first_pts;
+ int64_t dts_delta;
+
+ char *profile;
+ char *level;
+
+ bool flushing;
+ bool has_b_frames;
+ bool warned_color_range;
+} VTEncContext;
+
+static void set_async_error(VTEncContext *vtctx, int err)
+{
+ BufNode *info;
+
+ pthread_mutex_lock(&vtctx->lock);
+
+ vtctx->async_error = err;
+
+ info = vtctx->q_head;
+ vtctx->q_head = vtctx->q_tail = NULL;
+
+ while (info) {
+ BufNode *next = info->next;
+ CFRelease(info->cm_buffer);
+ free(info);
+ info = next;
+ }
+
+ pthread_mutex_unlock(&vtctx->lock);
+}
+
+static int vtenc_q_pop(VTEncContext *vtctx, bool wait, CMSampleBufferRef *buf)
+{
+ BufNode *info;
+
+ pthread_mutex_lock(&vtctx->lock);
+
+ if (vtctx->async_error) {
+ pthread_mutex_unlock(&vtctx->lock);
+ return vtctx->async_error;
+ }
+
+ if (vtctx->flushing && vtctx->frame_ct_in == vtctx->frame_ct_out) {
+ *buf = NULL;
+
+ pthread_mutex_unlock(&vtctx->lock);
+ return 0;
+ }
+
+ while (!vtctx->q_head && !vtctx->async_error && wait) {
+ pthread_cond_wait(&vtctx->cv_sample_sent, &vtctx->lock);
+ }
+
+ if (!vtctx->q_head) {
+ pthread_mutex_unlock(&vtctx->lock);
+ *buf = NULL;
+ return 0;
+ }
+
+ info = vtctx->q_head;
+ vtctx->q_head = vtctx->q_head->next;
+ if (!vtctx->q_head) {
+ vtctx->q_tail = NULL;
+ }
+
+ pthread_mutex_unlock(&vtctx->lock);
+
+ *buf = info->cm_buffer;
+ free(info);
+
+ vtctx->frame_ct_out++;
+
+ return 0;
+}
+
+static void vtenc_q_push(VTEncContext *vtctx, CMSampleBufferRef buffer)
+{
+ BufNode *info = av_malloc(sizeof(BufNode));
+ if (!info) {
+ set_async_error(vtctx, AVERROR(ENOMEM));
+ return;
+ }
+
+ CFRetain(buffer);
+ info->cm_buffer = buffer;
+ info->next = NULL;
+
+ pthread_mutex_lock(&vtctx->lock);
+ pthread_cond_signal(&vtctx->cv_sample_sent);
+
+ if (!vtctx->q_head) {
+ vtctx->q_head = info;
+ } else {
+ vtctx->q_tail->next = info;
+ }
+
+ vtctx->q_tail = info;
+
+ pthread_mutex_unlock(&vtctx->lock);
+}
+
+static CMVideoCodecType get_cm_codec_type(enum AVCodecID id)
+{
+ switch (id) {
+ case AV_CODEC_ID_H264: return kCMVideoCodecType_H264;
+ default: return 0;
+ }
+}
+
+static void vtenc_free_block(void *opaque, uint8_t *data)
+{
+ CMBlockBufferRef block = opaque;
+ CFRelease(block);
+}
+
+/**
+ * Get the parameter sets from a CMSampleBufferRef.
+ * @param dst If *dst isn't NULL, the parameters are copied into existing
+ * memory. *dst_size must be set accordingly when *dst != NULL.
+ * If *dst is NULL, it will be allocated.
+ * In all cases, *dst_size is set to the number of bytes used
starting
+ * at *dst.
+ */
+static int get_params_size(
+ AVCodecContext *avctx,
+ CMVideoFormatDescriptionRef vid_fmt,
+ size_t *size)
+{
+ size_t total_size = 0;
+ size_t ps_count;
+ size_t i;
+ OSStatus status;
+ status = CMVideoFormatDescriptionGetH264ParameterSetAtIndex(vid_fmt,
+ 0,
+ NULL,
+ NULL,
+ &ps_count,
+ NULL);
+ if (status) {
+ av_log(avctx, AV_LOG_ERROR, "Error getting parameter set count: %d\n",
status);
+ return AVERROR_EXTERNAL;
+ }
+
+ for(i = 0; i < ps_count; i++){
+ const uint8_t *ps;
+ size_t ps_size;
+ status = CMVideoFormatDescriptionGetH264ParameterSetAtIndex(vid_fmt,
+ i,
+ &ps,
+ &ps_size,
+ NULL,
+ NULL);
+ if(status){
+ av_log(avctx, AV_LOG_ERROR, "Error getting parameter set size for
index %zd: %d\n", i, status);
+ return AVERROR_EXTERNAL;
+ }
+
+ total_size += ps_size + sizeof(start_code);
+ }
+
+ *size = total_size;
+ return 0;
+}
+
+static int copy_param_sets(
+ AVCodecContext *avctx,
+ CMVideoFormatDescriptionRef vid_fmt,
+ uint8_t *dst,
+ size_t dst_size)
+{
+ size_t ps_count;
+ OSStatus status;
+ size_t offset = 0;
+ size_t i;
+
+ status = CMVideoFormatDescriptionGetH264ParameterSetAtIndex(vid_fmt,
+ 0,
+ NULL,
+ NULL,
+ &ps_count,
+ NULL);
+ if (status) {
+ av_log(avctx, AV_LOG_ERROR, "Error getting parameter set count for
copying: %d\n", status);
+ return AVERROR_EXTERNAL;
+ }
+
+ for (i = 0; i < ps_count; i++) {
+ const uint8_t *ps;
+ size_t ps_size;
+ size_t next_offset;
+
+ status = CMVideoFormatDescriptionGetH264ParameterSetAtIndex(vid_fmt,
+ i,
+ &ps,
+ &ps_size,
+ NULL,
+ NULL);
+ if (status) {
+ av_log(avctx, AV_LOG_ERROR, "Error getting parameter set data for
index %zd: %d\n", i, status);
+ return AVERROR_EXTERNAL;
+ }
+
+ next_offset = offset + sizeof(start_code) + ps_size;
+ if (dst_size < next_offset) {
+ av_log(avctx, AV_LOG_ERROR, "Error: buffer too small for parameter
sets.\n");
+ return AVERROR_BUFFER_TOO_SMALL;
+ }
+
+ memcpy(dst + offset, start_code, sizeof(start_code));
+ offset += sizeof(start_code);
+
+ memcpy(dst + offset, ps, ps_size);
+ offset = next_offset;
+ }
+
+ return 0;
+}
+
+static int set_extradata(AVCodecContext *avctx, CMSampleBufferRef
sample_buffer)
+{
+ CMVideoFormatDescriptionRef vid_fmt;
+ size_t total_size;
+ int status;
+
+ vid_fmt = CMSampleBufferGetFormatDescription(sample_buffer);
+ if (!vid_fmt) {
+ av_log(avctx, AV_LOG_ERROR, "No video format.\n");
+ return AVERROR_EXTERNAL;
+ }
+
+ status = get_params_size(avctx, vid_fmt, &total_size);
+ if (status) {
+ av_log(avctx, AV_LOG_ERROR, "Could not get parameter sets.\n");
+ return status;
+ }
+
+ avctx->extradata = av_malloc(total_size);
+ if (!avctx->extradata) {
+ return AVERROR(ENOMEM);
+ }
+ avctx->extradata_size = total_size;
+
+ status = copy_param_sets(avctx, vid_fmt, avctx->extradata, total_size);
+ if (status) {
+ av_log(avctx, AV_LOG_ERROR, "Could not copy param sets.\n");
+ return status;
+ }
+
+ return 0;
+}
+
+static void vtenc_output_callback(
+ void *CM_NULLABLE ctx,
+ void *sourceFrameCtx,
+ OSStatus status,
+ VTEncodeInfoFlags flags,
+ CM_NULLABLE CMSampleBufferRef sample_buffer)
+{
+ AVCodecContext *avctx = ctx;
+ VTEncContext *vtctx = avctx->priv_data;
+
+ if (vtctx->async_error) {
+ if(sample_buffer) CFRelease(sample_buffer);
+ return;
+ }
+
+ if (status || !sample_buffer) {
+ av_log(avctx, AV_LOG_ERROR, "Error encoding frame: %d\n", status);
+ set_async_error(vtctx, AVERROR_EXTERNAL);
+ return;
+ }
+
+ if (!avctx->extradata && (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER)) {
+ int set_status = set_extradata(avctx, sample_buffer);
+ if (set_status) {
+ set_async_error(vtctx, set_status);
+ return;
+ }
+ }
+
+ vtenc_q_push(vtctx, sample_buffer);
+}
+
+static int get_length_code_size(
+ AVCodecContext *avctx,
+ CMSampleBufferRef sample_buffer,
+ size_t *size)
+{
+ CMVideoFormatDescriptionRef vid_fmt;
+ int isize;
+ OSStatus status;
+
+ vid_fmt = CMSampleBufferGetFormatDescription(sample_buffer);
+ if (!vid_fmt) {
+ av_log(avctx, AV_LOG_ERROR, "Error getting buffer format
description.\n");
+ return AVERROR_EXTERNAL;
+ }
+
+ status = CMVideoFormatDescriptionGetH264ParameterSetAtIndex(vid_fmt,
+ 0,
+ NULL,
+ NULL,
+ NULL,
+ &isize);
+ if (status) {
+ av_log(avctx, AV_LOG_ERROR, "Error getting length code size: %d\n",
status);
+ return AVERROR_EXTERNAL;
+ }
+
+ *size = isize;
+ return 0;
+}
+
+/*
+ * Returns true on success.
+ *
+ * If profile_level_val is NULL and this method returns true, don't specify the
+ * profile/level to the encoder.
+ */
+static bool get_vt_profile_level(AVCodecContext *avctx,
+ CFStringRef *profile_level_val)
+{
+ VTEncContext *vtctx = avctx->priv_data;
+
+ const char *profile = vtctx->profile;
+ const char *level = vtctx->level ? vtctx->level : "auto";
+
+ if (!profile && av_strcasecmp(level, "auto")) {
+ //Need to pick a profile if level is not auto-selected.
+ profile = vtctx->has_b_frames ? "main" : "baseline";
+ }
+
+ //Fewer cases for if-blocks below
+ if (!strcmp("3", level)) level = "3.0";
+ else if (!strcmp("4", level)) level = "4.0";
+ else if (!strcmp("5", level)) level = "5.0";
+ else if (!av_strcasecmp("auto", level)) level = "auto";
+
+ *profile_level_val = NULL;
+
+ if (!profile) {
+ //VideoToolbox auto-selects profile and level.
+ return true;
+ } else if (!av_strcasecmp("baseline", profile)) {
+ if (!strcmp("auto", level)) *profile_level_val =
kVTProfileLevel_H264_Baseline_AutoLevel;
+ else if (!strcmp("1.3", level)) *profile_level_val =
kVTProfileLevel_H264_Baseline_1_3;
+ else if (!strcmp("3.0", level)) *profile_level_val =
kVTProfileLevel_H264_Baseline_3_0;
+ else if (!strcmp("3.1", level)) *profile_level_val =
kVTProfileLevel_H264_Baseline_3_1;
+ else if (!strcmp("3.2", level)) *profile_level_val =
kVTProfileLevel_H264_Baseline_3_2;
+ else if (!strcmp("4.0", level)) *profile_level_val =
kVTProfileLevel_H264_Baseline_4_0;
+ else if (!strcmp("4.1", level)) *profile_level_val =
kVTProfileLevel_H264_Baseline_4_1;
+ else if (!strcmp("4.2", level)) *profile_level_val =
kVTProfileLevel_H264_Baseline_4_2;
+ else if (!strcmp("5.0", level)) *profile_level_val =
kVTProfileLevel_H264_Baseline_5_0;
+ else if (!strcmp("5.1", level)) *profile_level_val =
kVTProfileLevel_H264_Baseline_5_1;
+ else if (!strcmp("5.2", level)) *profile_level_val =
kVTProfileLevel_H264_Baseline_5_2;
+ else {
+ av_log(avctx, AV_LOG_ERROR, "Unrecognized level %s\n",
vtctx->level);
+ return false;
+ }
+ } else if (!av_strcasecmp("main", profile)) {
+ if (!strcmp("auto", level)) *profile_level_val =
kVTProfileLevel_H264_Main_AutoLevel;
+ else if (!strcmp("3.0", level)) *profile_level_val =
kVTProfileLevel_H264_Main_3_0;
+ else if (!strcmp("3.1", level)) *profile_level_val =
kVTProfileLevel_H264_Main_3_1;
+ else if (!strcmp("3.2", level)) *profile_level_val =
kVTProfileLevel_H264_Main_3_2;
+ else if (!strcmp("4.0", level)) *profile_level_val =
kVTProfileLevel_H264_Main_4_0;
+ else if (!strcmp("4.1", level)) *profile_level_val =
kVTProfileLevel_H264_Main_4_1;
+ else if (!strcmp("4.2", level)) *profile_level_val =
kVTProfileLevel_H264_Main_4_2;
+ else if (!strcmp("5.0", level)) *profile_level_val =
kVTProfileLevel_H264_Main_5_0;
+ else if (!strcmp("5.1", level)) *profile_level_val =
kVTProfileLevel_H264_Main_5_1;
+ else if (!strcmp("5.2", level)) *profile_level_val =
kVTProfileLevel_H264_Main_5_2;
+ else {
+ av_log(avctx, AV_LOG_ERROR, "Unrecognized level %s\n",
vtctx->level);
+ return false;
+ }
+ } else if (!av_strcasecmp("high", profile)) {
+ if (!strcmp("auto", level)) *profile_level_val =
kVTProfileLevel_H264_High_AutoLevel;
+ else if (!strcmp("3.0", level)) *profile_level_val =
kVTProfileLevel_H264_High_3_0;
+ else if (!strcmp("3.1", level)) *profile_level_val =
kVTProfileLevel_H264_High_3_1;
+ else if (!strcmp("3.2", level)) *profile_level_val =
kVTProfileLevel_H264_High_3_2;
+ else if (!strcmp("4.0", level)) *profile_level_val =
kVTProfileLevel_H264_High_4_0;
+ else if (!strcmp("4.1", level)) *profile_level_val =
kVTProfileLevel_H264_High_4_1;
+ else if (!strcmp("4.2", level)) *profile_level_val =
kVTProfileLevel_H264_High_4_2;
+ else if (!strcmp("5.0", level)) *profile_level_val =
kVTProfileLevel_H264_High_5_0;
+ else if (!strcmp("5.1", level)) *profile_level_val =
kVTProfileLevel_H264_High_5_1;
+ else if (!strcmp("5.2", level)) *profile_level_val =
kVTProfileLevel_H264_High_5_2;
+ else {
+ av_log(avctx, AV_LOG_ERROR, "Unrecognized level %s\n",
vtctx->level);
+ return false;
+ }
+ } else {
+ av_log(avctx, AV_LOG_ERROR, "Unrecognized profile %s\n",
vtctx->profile);
+ return false;
+ }
+
+ return true;
+}
+
+static av_cold int vtenc_init(AVCodecContext *avctx)
+{
+ CFMutableDictionaryRef enc_info;
+ CMVideoCodecType codec_type;
+ VTEncContext *vtctx = avctx->priv_data;
+ CFStringRef profile_level;
+ SInt32 bit_rate = avctx->bit_rate;
+ CFNumberRef bit_rate_num;
+ 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->has_b_frames || avctx->max_b_frames > 0;
+
+ 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
+ CFDictionarySetValue(enc_info,
kVTVideoEncoderSpecification_RequireHardwareAcceleratedVideoEncoder,
kCFBooleanTrue);
+ CFDictionarySetValue(enc_info,
kVTVideoEncoderSpecification_EnableHardwareAcceleratedVideoEncoder,
kCFBooleanTrue);
+#endif
+
+ status = VTCompressionSessionCreate(
+ kCFAllocatorDefault,
+ avctx->width,
+ avctx->height,
+ codec_type,
+ enc_info,
+ NULL,
+ kCFAllocatorDefault,
+ vtenc_output_callback,
+ avctx,
+ &vtctx->session
+ );
+
+#if !TARGET_OS_IPHONE
+ if (status != 0 || !vtctx->session) {
+ CFDictionaryRemoveValue(enc_info,
kVTVideoEncoderSpecification_RequireHardwareAcceleratedVideoEncoder);
+
+ status = VTCompressionSessionCreate(
+ kCFAllocatorDefault,
+ avctx->width,
+ avctx->height,
+ codec_type,
+ enc_info,
+ NULL,
+ kCFAllocatorDefault,
+ vtenc_output_callback,
+ avctx,
+ &vtctx->session
+ );
+ }
+#endif
+
+ CFRelease(enc_info);
+
+ if (status || !vtctx->session) {
+ av_log(avctx, AV_LOG_ERROR, "Error: cannot create compression session:
%d\n", status);
+ return AVERROR_EXTERNAL;
+ }
+
+ bit_rate_num = CFNumberCreate(kCFAllocatorDefault,
+ kCFNumberSInt32Type,
+ &bit_rate);
+ if (!bit_rate_num) return AVERROR(ENOMEM);
+
+ status = VTSessionSetProperty(vtctx->session,
+ kVTCompressionPropertyKey_AverageBitRate,
+ bit_rate_num);
+ CFRelease(bit_rate_num);
+
+ if (status) {
+ av_log(avctx, AV_LOG_ERROR, "Error setting bitrate property: %d\n",
status);
+ return AVERROR_EXTERNAL;
+ }
+
+ if (profile_level) {
+ status = VTSessionSetProperty(vtctx->session,
+ kVTCompressionPropertyKey_ProfileLevel,
+ profile_level);
+ if (status) {
+ av_log(avctx, AV_LOG_ERROR, "Error setting profile/level property:
%d\n", status);
+ return AVERROR_EXTERNAL;
+ }
+ }
+
+ if (avctx->gop_size > 0) {
+ CFNumberRef interval = CFNumberCreate(kCFAllocatorDefault,
+ kCFNumberIntType,
+ &avctx->gop_size);
+ status = VTSessionSetProperty(vtctx->session,
+
kVTCompressionPropertyKey_MaxKeyFrameInterval,
+ interval);
+
+ if (status) {
+ av_log(avctx, AV_LOG_ERROR, "Error setting 'max key-frame
interval' property: %d\n", status);
+ return AVERROR_EXTERNAL;
+ }
+ }
+
+ if (!vtctx->has_b_frames) {
+ status = VTSessionSetProperty(vtctx->session,
+
kVTCompressionPropertyKey_AllowFrameReordering,
+ kCFBooleanFalse);
+
+ if (status) {
+ av_log(avctx, AV_LOG_ERROR, "Error setting 'allow frame
reordering' property: %d\n", status);
+ return AVERROR_EXTERNAL;
+ }
+ }
+
+ status = VTCompressionSessionPrepareToEncodeFrames(vtctx->session);
+ if (status) {
+ av_log(avctx, AV_LOG_ERROR, "Error: cannot prepare encoder: %d\n",
status);
+ return AVERROR_EXTERNAL;
+ }
+
+ pthread_mutex_init(&vtctx->lock, NULL);
+ pthread_cond_init(&vtctx->cv_sample_sent, NULL);
+ vtctx->dts_delta = vtctx->has_b_frames ? -1 : 0;
+
+ return 0;
+}
+
+static void vtenc_get_frame_info(CMSampleBufferRef buffer, bool *is_key_frame)
+{
+ CFArrayRef attachments;
+ CFDictionaryRef attachment;
+ CFBooleanRef not_sync;
+ CFIndex len;
+
+ attachments = CMSampleBufferGetSampleAttachmentsArray(buffer, false);
+ len = !attachments ? 0 : CFArrayGetCount(attachments);
+
+ if (!len) {
+ *is_key_frame = true;
+ return;
+ }
+
+ attachment = CFArrayGetValueAtIndex(attachments, 0);
+
+ if (CFDictionaryGetValueIfPresent(attachment,
+ kCMSampleAttachmentKey_NotSync,
+ (const void **)¬_sync))
+ {
+ *is_key_frame = !CFBooleanGetValue(not_sync);
+ } else {
+ *is_key_frame = true;
+ }
+}
+
+/**
+ * Replaces length codes with H.264 Annex B start codes.
+ * length_code_size must equal sizeof(start_code).
+ * On failure, the contents of data may have been modified.
+ *
+ * @param length_code_size Byte length of each length code
+ * @param data Call with NAL units prefixed with length codes.
+ * On success, the length codes are replace with
+ * start codes.
+ * @param size Length of data, excluding any padding.
+ * @return 0 on success
+ * AVERROR_BUFFER_TOO_SMALL if length code size is smaller
+ * than a start code or if a length_code in data specifies
+ * data beyond the end of its buffer.
+ */
+static int replace_length_codes(size_t length_code_size,
+ uint8_t *data,
+ size_t size)
+{
+ size_t remaining_size = size;
+
+ if (length_code_size != sizeof(start_code)) {
+ av_log(NULL, AV_LOG_ERROR, "Start code size and length code size not
equal.\n");
+ return AVERROR_BUFFER_TOO_SMALL;
+ }
+
+ while (remaining_size > 0) {
+ size_t box_len = 0;
+ size_t i;
+
+ for (i = 0; i < length_code_size; i++) {
+ box_len <<= 8;
+ box_len |= data[i];
+ }
+
+ if (remaining_size < box_len + sizeof(start_code)) {
+ av_log(NULL, AV_LOG_ERROR, "Length is out of range.\n");
+ AVERROR_BUFFER_TOO_SMALL;
+ }
+
+ memcpy(data, start_code, sizeof(start_code));
+ data += box_len + sizeof(start_code);
+ remaining_size -= box_len + sizeof(start_code);
+ }
+
+ return 0;
+}
+
+/**
+ * Copies NAL units and replaces length codes with
+ * H.264 Annex B start codes. On failure, the contents of
+ * dst_data may have been modified.
+ *
+ * @param length_code_size Byte length of each length code
+ * @param src_data NAL units prefixed with length codes.
+ * @param src_size Length of buffer, excluding any padding.
+ * @param dst_data Must be zeroed before calling this function.
+ * Contains the copied NAL units prefixed with
+ * start codes when the function returns
+ * successfully.
+ * @param dst_size Length of dst_data
+ * @return 0 on success
+ * AVERROR_INVALIDDATA if length_code_size is invalid
+ * AVERROR_BUFFER_TOO_SMALL if dst_data is too small
+ * or if a length_code in src_data specifies data beyond
+ * the end of its buffer.
+ */
+static int copy_replace_length_codes(
+ size_t length_code_size,
+ const uint8_t *src_data,
+ size_t src_size,
+ uint8_t *dst_data,
+ size_t dst_size)
+{
+ size_t remaining_src_size = src_size;
+ size_t remaining_dst_size = dst_size;
+
+ if (length_code_size > 4) {
+ return AVERROR_INVALIDDATA;
+ }
+
+ while (remaining_src_size > 0) {
+ size_t curr_src_len;
+ size_t curr_dst_len;
+ size_t box_len = 0;
+ size_t i;
+
+ uint8_t *dst_box;
+ const uint8_t *src_box;
+
+ for (i = 0; i < length_code_size; i++) {
+ box_len <<= 8;
+ box_len |= src_data[i];
+ }
+
+ curr_src_len = box_len + length_code_size;
+ curr_dst_len = box_len + sizeof(start_code);
+
+ if (remaining_src_size < curr_src_len) {
+ return AVERROR_BUFFER_TOO_SMALL;
+ }
+
+ if (remaining_dst_size < curr_dst_len) {
+ return AVERROR_BUFFER_TOO_SMALL;
+ }
+
+ dst_box = dst_data + sizeof(start_code);
+ src_box = src_data + length_code_size;
+
+ memcpy(dst_data, start_code, sizeof(start_code));
+ memcpy(dst_box, src_box, box_len);
+
+ src_data += curr_src_len;
+ dst_data += curr_dst_len;
+
+ remaining_src_size -= curr_src_len;
+ remaining_dst_size -= curr_dst_len;
+ }
+
+ return 0;
+}
+
+static int vtenc_cm_to_avpacket(
+ AVCodecContext *avctx,
+ CMSampleBufferRef sample_buffer,
+ AVPacket *pkt)
+{
+ VTEncContext *vtctx = avctx->priv_data;
+
+ int status;
+ bool is_key_frame;
+ bool add_header;
+ char *buf_data;
+ size_t length_code_size;
+ size_t header_size = 0;
+ size_t in_buf_size;
+ int64_t dts_delta;
+ int64_t time_base_num;
+ CMTime pts;
+ CMTime dts;
+
+ CMBlockBufferRef block;
+ CMVideoFormatDescriptionRef vid_fmt;
+
+
+ vtenc_get_frame_info(sample_buffer, &is_key_frame);
+ status = get_length_code_size(avctx, sample_buffer, &length_code_size);
+ if (status) return status;
+
+ add_header = is_key_frame && !(avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER);
+
+ if (add_header) {
+ vid_fmt = CMSampleBufferGetFormatDescription(sample_buffer);
+ if (!vid_fmt) {
+ av_log(avctx, AV_LOG_ERROR, "Cannot get format description.\n");
+ }
+
+ int status = get_params_size(avctx, vid_fmt, &header_size);
+ if (status) return status;
+ }
+
+ block = CMSampleBufferGetDataBuffer(sample_buffer);
+ if (!block) {
+ av_log(avctx, AV_LOG_ERROR, "Could not get block buffer from sample
buffer.\n");
+ return AVERROR_EXTERNAL;
+ }
+
+
+ status = CMBlockBufferGetDataPointer(block, 0, &in_buf_size, NULL,
&buf_data);
+ if (status) {
+ av_log(avctx, AV_LOG_ERROR, "Error: cannot get data pointer: %d\n",
status);
+ return AVERROR_EXTERNAL;
+ }
+
+ size_t out_buf_size = header_size + in_buf_size;
+ bool can_reuse_cmbuffer = !add_header &&
+ !pkt->data &&
+ length_code_size == sizeof(start_code);
+
+ av_init_packet(pkt);
+
+ if (can_reuse_cmbuffer) {
+ AVBufferRef* buf_ref = av_buffer_create(
+ buf_data,
+ out_buf_size,
+ vtenc_free_block,
+ block,
+ 0
+ );
+
+ if (!buf_ref) return AVERROR(ENOMEM);
+
+ CFRetain(block);
+
+ pkt->buf = buf_ref;
+ pkt->data = buf_data;
+ pkt->size = in_buf_size;
+
+ status = replace_length_codes(length_code_size, pkt->data, pkt->size);
+ if (status) {
+ av_log(avctx, AV_LOG_ERROR, "Error replacing length codes: %d\n",
status);
+ return status;
+ }
+ } else {
+ if (!pkt->data) {
+ status = av_new_packet(pkt, out_buf_size);
+ if(status) return status;
+ }
+
+ if (pkt->size < out_buf_size) {
+ av_log(avctx, AV_LOG_ERROR, "Error: packet's buffer is too
small.\n");
+ return AVERROR_BUFFER_TOO_SMALL;
+ }
+
+ if (add_header) {
+ status = copy_param_sets(avctx, vid_fmt, pkt->data, out_buf_size);
+ if(status) return status;
+ }
+
+ status = copy_replace_length_codes(
+ length_code_size,
+ buf_data,
+ in_buf_size,
+ pkt->data + header_size,
+ pkt->size - header_size
+ );
+
+ if (status) {
+ av_log(avctx, AV_LOG_ERROR, "Error copying packet data: %d",
status);
+ return status;
+ }
+ }
+
+ if (is_key_frame) {
+ pkt->flags |= AV_PKT_FLAG_KEY;
+ }
+
+ pts = CMSampleBufferGetPresentationTimeStamp(sample_buffer);
+ dts = CMSampleBufferGetDecodeTimeStamp (sample_buffer);
+
+ dts_delta = vtctx->dts_delta >= 0 ? vtctx->dts_delta : 0;
+ time_base_num = avctx->time_base.num;
+ pkt->pts = pts.value / time_base_num;
+ pkt->dts = dts.value / time_base_num - dts_delta;
+
+ return 0;
+}
+
+static int get_cv_pixel_info(
+ AVCodecContext *avctx,
+ const AVFrame *frame,
+ int *color,
+ int *plane_count,
+ size_t *widths,
+ size_t *heights,
+ size_t *strides)
+{
+ VTEncContext *vtctx = avctx->priv_data;
+ int av_format = frame->format;
+ int av_color_range = frame->color_range;
+
+ switch (av_format) {
+ case AV_PIX_FMT_NV12:
+ switch (av_color_range) {
+ case AVCOL_RANGE_MPEG:
+ *color = kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange;
+ break;
+
+ case AVCOL_RANGE_JPEG:
+ *color = kCVPixelFormatType_420YpCbCr8BiPlanarFullRange;
+ break;
+
+ default:
+ if (!vtctx->warned_color_range) {
+ vtctx->warned_color_range = true;
+ av_log(avctx, AV_LOG_WARNING, "Color range not set for NV12.
Using MPEG range.\n");
+ }
+ *color = kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange;
+ }
+
+ *plane_count = 2;
+
+ widths [0] = avctx->width;
+ heights[0] = avctx->height;
+ strides[0] = frame ? frame->linesize[0] : avctx->width;
+
+ widths [1] = (avctx->width + 1) / 2;
+ heights[1] = (avctx->height + 1) / 2;
+ strides[1] = frame ? frame->linesize[1] : (avctx->width + 1) & -2;
+ break;
+
+ case AV_PIX_FMT_YUV420P:
+ switch (av_color_range) {
+ case AVCOL_RANGE_MPEG:
+ *color = kCVPixelFormatType_420YpCbCr8Planar;
+ break;
+
+ case AVCOL_RANGE_JPEG:
+ *color = kCVPixelFormatType_420YpCbCr8PlanarFullRange;
+ break;
+
+ default:
+ if (!vtctx->warned_color_range) {
+ vtctx->warned_color_range = true;
+ av_log(avctx, AV_LOG_WARNING, "Color range not set for YUV
4:2:0. Using MPEG range.\n");
+ }
+ *color = kCVPixelFormatType_420YpCbCr8Planar;
+ }
+
+ *plane_count = 3;
+
+ widths [0] = avctx->width;
+ heights[0] = avctx->height;
+ strides[0] = frame ? frame->linesize[0] : avctx->width;
+
+ widths [1] = (avctx->width + 1) / 2;
+ heights[1] = (avctx->height + 1) / 2;
+ strides[1] = frame ? frame->linesize[1] : (avctx->width + 1) / 2;
+
+ widths [2] = (avctx->width + 1) / 2;
+ heights[2] = (avctx->height + 1) / 2;
+ strides[2] = frame ? frame->linesize[2] : (avctx->width + 1) / 2;
+ break;
+
+ default: return AVERROR(EINVAL);
+ }
+
+ return 0;
+}
+
+static void free_avframe(
+ void *CV_NULLABLE release_ctx,
+ const void *CV_NULLABLE data,
+ size_t size,
+ size_t plane_count,
+ const void *CV_NULLABLE plane_addresses[])
+{
+ AVFrame *frame = release_ctx;
+ av_frame_free(&frame);
+}
+
+static int vtenc_send_frame(AVCodecContext *avctx,
+ VTEncContext *vtctx,
+ const AVFrame *frame)
+{
+ int plane_count;
+ int color;
+ size_t widths [AV_NUM_DATA_POINTERS];
+ size_t heights[AV_NUM_DATA_POINTERS];
+ size_t strides[AV_NUM_DATA_POINTERS];
+ int status;
+ CVPixelBufferRef cv_img;
+ CMTime time;
+
+ av_assert0(frame);
+
+ status = get_cv_pixel_info(avctx,
+ frame,
+ &color,
+ &plane_count,
+ widths,
+ heights,
+ strides);
+ if (status) {
+ av_log(
+ avctx,
+ AV_LOG_ERROR,
+ "Error: Cannot convert format %d color_range %d: %d\n",
+ frame->format,
+ frame->color_range,
+ status
+ );
+ return AVERROR_EXTERNAL;
+ }
+
+ AVFrame *enc_frame = av_frame_alloc();
+ if (!enc_frame) return AVERROR(ENOMEM);
+
+ status = av_frame_ref(enc_frame, frame);
+ if (status) {
+ av_frame_free(&enc_frame);
+ return status;
+ }
+
+ status = CVPixelBufferCreateWithPlanarBytes(
+ kCFAllocatorDefault,
+ enc_frame->width,
+ enc_frame->height,
+ color,
+ NULL,
+ 0,
+ plane_count,
+ (void **)enc_frame->data,
+ widths,
+ heights,
+ strides,
+ free_avframe,
+ enc_frame,
+ NULL,
+ &cv_img
+ );
+
+ if (status) {
+ av_log(avctx, AV_LOG_ERROR, "Error: cannot create CVPixelBufferRef:
%d\n", status);
+ return AVERROR_EXTERNAL;
+ }
+
+ time = CMTimeMake(frame->pts * avctx->time_base.num, avctx->time_base.den);
+ status = VTCompressionSessionEncodeFrame(
+ vtctx->session,
+ cv_img,
+ time,
+ kCMTimeInvalid,
+ NULL,
+ NULL,
+ NULL
+ );
+
+ CFRelease(cv_img);
+
+ if (status) {
+ av_log(avctx, AV_LOG_ERROR, "Error: cannot encode frame: %d\n",
status);
+ return AVERROR_EXTERNAL;
+ }
+
+ return 0;
+}
+
+static av_cold int vtenc_frame(
+ AVCodecContext *avctx,
+ AVPacket *pkt,
+ const AVFrame *frame,
+ int *got_packet)
+{
+ VTEncContext *vtctx = avctx->priv_data;
+ bool get_frame;
+ int status;
+ CMSampleBufferRef buf = NULL;
+
+ if (frame) {
+ status = vtenc_send_frame(avctx, vtctx, frame);
+
+ if (status) {
+ status = AVERROR_EXTERNAL;
+ goto end_nopkt;
+ }
+
+ if (vtctx->frame_ct_in == 0) {
+ vtctx->first_pts = frame->pts;
+ } else if(vtctx->frame_ct_in == 1 && vtctx->has_b_frames) {
+ vtctx->dts_delta = frame->pts - vtctx->first_pts;
+ }
+
+ vtctx->frame_ct_in++;
+ } else if(!vtctx->flushing) {
+ vtctx->flushing = true;
+
+ status = VTCompressionSessionCompleteFrames(vtctx->session,
+ kCMTimeIndefinite);
+
+ if (status) {
+ av_log(avctx, AV_LOG_ERROR, "Error flushing frames: %d\n", status);
+ status = AVERROR_EXTERNAL;
+ goto end_nopkt;
+ }
+ }
+
+ *got_packet = 0;
+ get_frame = vtctx->dts_delta >= 0 || !frame;
+ if (!get_frame) {
+ status = 0;
+ goto end_nopkt;
+ }
+
+ status = vtenc_q_pop(vtctx, !frame, &buf);
+ if (status) goto end_nopkt;
+ if (!buf) goto end_nopkt;
+
+ status = vtenc_cm_to_avpacket(avctx, buf, pkt);
+ CFRelease(buf);
+ if (status) goto end_nopkt;
+
+ *got_packet = 1;
+ return 0;
+
+end_nopkt:
+ av_packet_unref(pkt);
+ return status;
+}
+
+static av_cold int vtenc_close(AVCodecContext *avctx)
+{
+ VTEncContext *vtctx = avctx->priv_data;
+
+ if(!vtctx->session) return 0;
+
+ VTCompressionSessionInvalidate(vtctx->session);
+ pthread_cond_destroy(&vtctx->cv_sample_sent);
+ pthread_mutex_destroy(&vtctx->lock);
+ CFRelease(vtctx->session);
+ vtctx->session = NULL;
+
+ return 0;
+}
+
+static const enum AVPixelFormat pix_fmts[] = {
+ AV_PIX_FMT_NV12,
+ AV_PIX_FMT_YUV420P,
+ AV_PIX_FMT_NONE
+};
+
+#define OFFSET(x) offsetof(VTEncContext, x)
+#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption options[] = {
+ { "profile", "Profile", OFFSET(profile), AV_OPT_TYPE_STRING, { 0 },
0, 0, VE },
+ { "level", "Level", OFFSET(level), AV_OPT_TYPE_STRING, { .str=NULL
}, 0, 0, VE },
+ { NULL },
+};
+
+static const AVClass vtenc_class = {
+ .class_name = "vtenc",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+AVCodec ff_vtenc_encoder = {
+ .name = "vtenc",
+ .long_name = NULL_IF_CONFIG_SMALL("VideoToolbox H.264 Encoder"),
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_H264,
+ .priv_data_size = sizeof(VTEncContext),
+ .pix_fmts = pix_fmts,
+ .init = vtenc_init,
+ .encode2 = vtenc_frame,
+ .close = vtenc_close,
+ .capabilities = AV_CODEC_CAP_DELAY,
+ .priv_class = &vtenc_class,
+ .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
+ FF_CODEC_CAP_INIT_CLEANUP,
+};
--
2.5.4 (Apple Git-61)
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