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decavcodec.c
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decavcodec.c
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/* decavcodec.c
Copyright (c) 2003-2018 HandBrake Team
This file is part of the HandBrake source code
Homepage: <http://handbrake.fr/>.
It may be used under the terms of the GNU General Public License v2.
For full terms see the file COPYING file or visit http://www.gnu.org/licenses/gpl-2.0.html
*/
/* This module is Handbrake's interface to the ffmpeg decoder library
(libavcodec & small parts of libavformat). It contains four Handbrake
"work objects":
decavcodeca connects HB to an ffmpeg audio decoder
decavcodecv connects HB to an ffmpeg video decoder
(Two different routines are needed because the ffmpeg library
has different decoder calling conventions for audio & video.
These work objects are self-contained & follow all
of HB's conventions for a decoder module. They can be used like
any other HB decoder
These decoders handle 2 kinds of input. Streams that are demuxed
by HandBrake and streams that are demuxed by libavformat. In the
case of streams that are demuxed by HandBrake, there is an extra
parse step required that happens in decodeVideo and decavcodecaWork.
In the case of streams that are demuxed by libavformat, there is context
information that we need from the libavformat. This information is
propagated from hb_stream_open to these decoders through title->opaque_priv.
A consequence of the above is that the streams that are demuxed by HandBrake
*can't* use information from the AVStream because there isn't one - they
get their data from either the dvd reader or the mpeg reader, not the ffmpeg
stream reader. That means that they have to make up for deficiencies in the
AVCodecContext info by using stuff kept in the HB "title" struct. It
also means that ffmpeg codecs that randomly scatter state needed by
the decoder across both the AVCodecContext & the AVStream (e.g., the
VC1 decoder) can't easily be used by the HB mpeg stream reader.
*/
#include "hb.h"
#include "hbffmpeg.h"
#include "libavfilter/avfilter.h"
#include "libavfilter/buffersrc.h"
#include "libavfilter/buffersink.h"
#include "lang.h"
#include "audio_resample.h"
#ifdef USE_QSV
#include "qsv_common.h"
#endif
static void compute_frame_duration( hb_work_private_t *pv );
static int decavcodecaInit( hb_work_object_t *, hb_job_t * );
static int decavcodecaWork( hb_work_object_t *, hb_buffer_t **, hb_buffer_t ** );
static void decavcodecClose( hb_work_object_t * );
static int decavcodecaInfo( hb_work_object_t *, hb_work_info_t * );
static int decavcodecaBSInfo( hb_work_object_t *, const hb_buffer_t *, hb_work_info_t * );
static int get_color_prim(int color_primaries, hb_geometry_t geometry, hb_rational_t rate);
static int get_color_transfer(int color_trc);
static int get_color_matrix(int colorspace, hb_geometry_t geometry);
hb_work_object_t hb_decavcodeca =
{
.id = WORK_DECAVCODEC,
.name = "Audio decoder (libavcodec)",
.init = decavcodecaInit,
.work = decavcodecaWork,
.close = decavcodecClose,
.info = decavcodecaInfo,
.bsinfo = decavcodecaBSInfo
};
typedef struct
{
uint8_t * data;
int size;
int64_t pts;
int64_t dts;
int frametype;
int scr_sequence;
int new_chap;
} packet_info_t;
typedef struct reordered_data_s reordered_data_t;
struct reordered_data_s
{
int64_t sequence;
int64_t pts;
int scr_sequence;
int new_chap;
};
#define REORDERED_HASH_SZ (2 << 7)
#define REORDERED_HASH_MASK (REORDERED_HASH_SZ - 1)
struct video_filters_s
{
AVFilterGraph * graph;
AVFilterContext * last;
AVFilterContext * input;
AVFilterContext * output;
int width;
int height;
int pix_fmt;
};
struct hb_work_private_s
{
hb_job_t * job;
hb_title_t * title;
AVCodec * codec;
AVCodecContext * context;
AVCodecParserContext * parser;
AVFrame * frame;
hb_buffer_t * palette;
int threads;
int video_codec_opened;
hb_buffer_list_t list;
double duration; // frame duration (for video)
double field_duration; // field duration (for video)
int64_t chap_time; // time of next chap mark
int chap_scr;
int new_chap; // output chapter mark pending
int64_t last_pts;
double next_pts;
uint32_t nframes;
uint32_t decode_errors;
packet_info_t packet_info;
uint8_t unfinished;
reordered_data_t * reordered_hash[REORDERED_HASH_SZ];
int64_t sequence;
int last_scr_sequence;
int last_chapter;
struct video_filters_s video_filters;
hb_audio_t * audio;
hb_audio_resample_t * resample;
int drop_samples;
#ifdef USE_QSV
// QSV-specific settings
struct
{
int decode;
hb_qsv_config config;
const char * codec_name;
} qsv;
#endif
hb_list_t * list_subtitle;
};
static void decodeAudio( hb_work_private_t *pv, packet_info_t * packet_info );
/***********************************************************************
* hb_work_decavcodec_init
***********************************************************************
*
**********************************************************************/
static int decavcodecaInit( hb_work_object_t * w, hb_job_t * job )
{
AVCodec * codec;
hb_work_private_t * pv = calloc( 1, sizeof( hb_work_private_t ) );
w->private_data = pv;
pv->job = job;
pv->audio = w->audio;
pv->drop_samples = w->audio->config.in.encoder_delay;
pv->next_pts = (int64_t)AV_NOPTS_VALUE;
if (job)
pv->title = job->title;
else
pv->title = w->title;
hb_buffer_list_clear(&pv->list);
codec = avcodec_find_decoder(w->codec_param);
pv->context = avcodec_alloc_context3(codec);
if (pv->title->opaque_priv != NULL)
{
AVFormatContext *ic = (AVFormatContext*)pv->title->opaque_priv;
avcodec_parameters_to_context(pv->context,
ic->streams[w->audio->id]->codecpar);
// libav's eac3 parser toggles the codec_id in the context as
// it reads eac3 data between AV_CODEC_ID_AC3 and AV_CODEC_ID_EAC3.
// It detects an AC3 sync pattern sometimes in ac3_sync() which
// causes it to eventually set avctx->codec_id to AV_CODEC_ID_AC3
// in ff_aac_ac3_parse(). Since we are parsing some data before
// we get here, the codec_id may have flipped. This will cause an
// error in hb_avcodec_open(). So flip it back!
pv->context->codec_id = w->codec_param;
}
else
{
pv->parser = av_parser_init(w->codec_param);
}
hb_ff_set_sample_fmt(pv->context, codec, AV_SAMPLE_FMT_FLT);
/* Downmixing & sample_fmt conversion */
if (!(w->audio->config.out.codec & HB_ACODEC_PASS_FLAG))
{
pv->resample =
hb_audio_resample_init(AV_SAMPLE_FMT_FLT,
w->audio->config.out.mixdown,
w->audio->config.out.normalize_mix_level);
if (pv->resample == NULL)
{
hb_error("decavcodecaInit: hb_audio_resample_init() failed");
return 1;
}
/*
* Some audio decoders can downmix using embedded coefficients,
* or dedicated audio substreams for a specific channel layout.
*
* But some will e.g. use normalized mix coefficients unconditionally,
* so we need to make sure this matches what the user actually requested.
*/
int avcodec_downmix = 0;
switch (w->codec_param)
{
case AV_CODEC_ID_AC3:
case AV_CODEC_ID_EAC3:
avcodec_downmix = w->audio->config.out.normalize_mix_level != 0;
break;
case AV_CODEC_ID_DTS:
avcodec_downmix = w->audio->config.out.normalize_mix_level == 0;
break;
case AV_CODEC_ID_TRUEHD:
avcodec_downmix = (w->audio->config.out.normalize_mix_level == 0 ||
w->audio->config.out.mixdown == HB_AMIXDOWN_MONO ||
w->audio->config.out.mixdown == HB_AMIXDOWN_DOLBY ||
w->audio->config.out.mixdown == HB_AMIXDOWN_DOLBYPLII);
break;
default:
break;
}
if (avcodec_downmix)
{
switch (w->audio->config.out.mixdown)
{
// request 5.1 before downmixing to dpl1/dpl2
case HB_AMIXDOWN_DOLBY:
case HB_AMIXDOWN_DOLBYPLII:
pv->context->request_channel_layout = AV_CH_LAYOUT_5POINT1;
break;
// request the layout corresponding to the selected mixdown
default:
pv->context->request_channel_layout =
hb_ff_mixdown_xlat(w->audio->config.out.mixdown, NULL);
break;
}
}
}
// libavcodec can't decode TrueHD Mono (bug #356)
// work around it by requesting Stereo and downmixing
if (w->codec_param == AV_CODEC_ID_TRUEHD &&
w->audio->config.in.channel_layout == AV_CH_LAYOUT_MONO)
{
pv->context->request_channel_layout = AV_CH_LAYOUT_STEREO;
}
// Set decoder opts...
AVDictionary * av_opts = NULL;
av_dict_set( &av_opts, "refcounted_frames", "1", 0 );
// Dynamic Range Compression
if (w->audio->config.out.dynamic_range_compression >= 0.0f &&
hb_audio_can_apply_drc(w->audio->config.in.codec,
w->audio->config.in.codec_param, 0))
{
float drc_scale_max = 1.0f;
/*
* avcodec_open will fail if the value for any of the options is out of
* range, so assume a conservative maximum of 1 and try to determine the
* option's actual upper limit.
*/
if (codec != NULL && codec->priv_class != NULL)
{
const AVOption *opt;
opt = av_opt_find2((void*)&codec->priv_class, "drc_scale", NULL,
AV_OPT_FLAG_DECODING_PARAM|AV_OPT_FLAG_AUDIO_PARAM,
AV_OPT_SEARCH_FAKE_OBJ, NULL);
if (opt != NULL)
{
drc_scale_max = opt->max;
}
}
if (w->audio->config.out.dynamic_range_compression > drc_scale_max)
{
hb_log("decavcodecaInit: track %d, sanitizing out-of-range DRC %.2f to %.2f",
w->audio->config.out.track,
w->audio->config.out.dynamic_range_compression, drc_scale_max);
w->audio->config.out.dynamic_range_compression = drc_scale_max;
}
char drc_scale[5]; // "?.??\n"
snprintf(drc_scale, sizeof(drc_scale), "%.2f",
w->audio->config.out.dynamic_range_compression);
av_dict_set(&av_opts, "drc_scale", drc_scale, 0);
}
if (hb_avcodec_open(pv->context, codec, &av_opts, 0))
{
av_dict_free( &av_opts );
hb_log("decavcodecaInit: avcodec_open failed");
return 1;
}
pv->context->pkt_timebase.num = pv->audio->config.in.timebase.num;
pv->context->pkt_timebase.den = pv->audio->config.in.timebase.den;
// avcodec_open populates av_opts with the things it didn't recognize.
AVDictionaryEntry *t = NULL;
while ((t = av_dict_get(av_opts, "", t, AV_DICT_IGNORE_SUFFIX)) != NULL)
{
hb_log("decavcodecaInit: unknown option '%s'", t->key);
}
av_dict_free( &av_opts );
pv->frame = av_frame_alloc();
if (pv->frame == NULL)
{
hb_log("decavcodecaInit: av_frame_alloc failed");
return 1;
}
return 0;
}
/***********************************************************************
* Close
***********************************************************************
*
**********************************************************************/
static void close_video_filters(hb_work_private_t *pv)
{
if (pv->video_filters.input != NULL)
{
avfilter_free(pv->video_filters.input);
pv->video_filters.input = NULL;
}
if (pv->video_filters.output != NULL)
{
avfilter_free(pv->video_filters.output);
pv->video_filters.output = NULL;
}
if (pv->video_filters.graph != NULL)
{
avfilter_graph_free(&pv->video_filters.graph);
}
pv->video_filters.last = NULL;
}
static void closePrivData( hb_work_private_t ** ppv )
{
hb_work_private_t * pv = *ppv;
if ( pv )
{
hb_buffer_list_close(&pv->list);
if ( pv->job && pv->context && pv->context->codec )
{
hb_log( "%s-decoder done: %u frames, %u decoder errors",
pv->context->codec->name, pv->nframes, pv->decode_errors);
}
av_frame_free(&pv->frame);
close_video_filters(pv);
if ( pv->parser )
{
av_parser_close(pv->parser);
}
if ( pv->context && pv->context->codec )
{
#ifdef USE_QSV
/*
* FIXME: knowingly leaked.
*
* If we're using our FFmpeg QSV wrapper, qsv_decode_end() will call
* MFXClose() on the QSV session. Even if decoding is complete, we
* still need that session for QSV filtering and/or encoding, so we
* we can't close the context here until we implement a proper fix.
*
* Interestingly, this may cause crashes even when QSV-accelerated
* decoding and encoding sessions are independent (e.g. decoding via
* libavcodec, but encoding using libhb, without us requesting any
* form of communication between the two libmfx sessions).
*/
//if (!(pv->qsv.decode && pv->job != NULL && (pv->job->vcodec & HB_VCODEC_QSV_MASK)))
#endif
{
hb_avcodec_free_context(&pv->context);
}
}
if ( pv->context )
{
hb_avcodec_free_context(&pv->context);
}
hb_audio_resample_free(pv->resample);
int ii;
for (ii = 0; ii < REORDERED_HASH_SZ; ii++)
{
free(pv->reordered_hash[ii]);
}
free(pv);
}
*ppv = NULL;
}
static void decavcodecClose( hb_work_object_t * w )
{
hb_work_private_t * pv = w->private_data;
if ( pv )
{
closePrivData( &pv );
w->private_data = NULL;
}
}
/***********************************************************************
* Work
***********************************************************************
*
**********************************************************************/
static int decavcodecaWork( hb_work_object_t * w, hb_buffer_t ** buf_in,
hb_buffer_t ** buf_out )
{
hb_work_private_t * pv = w->private_data;
hb_buffer_t * in = *buf_in;
// libavcodec/mpeg12dec.c requires buffers to be zero padded.
// If not zero padded, it can get stuck in an infinite loop.
// It's likely there are other decoders that expect the same.
if (in->data != NULL)
{
memset(in->data + in->size, 0, in->alloc - in->size);
}
if (in->s.flags & HB_BUF_FLAG_EOF)
{
/* EOF on input stream - send it downstream & say that we're done */
decodeAudio(pv, NULL);
hb_buffer_list_append(&pv->list, in);
*buf_in = NULL;
*buf_out = hb_buffer_list_clear(&pv->list);
return HB_WORK_DONE;
}
*buf_out = NULL;
int pos, len;
int64_t pts = in->s.start;
// There are a 3 scenarios that can happen here.
// 1. The buffer contains exactly one frame of data
// 2. The buffer contains multiple frames of data
// 3. The buffer contains a partial frame of data
//
// In scenario 2, we want to be sure that the timestamps are only
// applied to the first frame in the buffer. Additional frames
// in the buffer will have their timestamps computed in sync.
//
// In scenario 3, we need to save the ancillary buffer info of an
// unfinished frame so it can be applied when we receive the last
// buffer of that frame.
if (!pv->unfinished)
{
// New packet, and no previous data pending
pv->packet_info.scr_sequence = in->s.scr_sequence;
pv->packet_info.new_chap = in->s.new_chap;
pv->packet_info.frametype = in->s.frametype;
}
for (pos = 0; pos < in->size; pos += len)
{
uint8_t * pout;
int pout_len;
int64_t parser_pts;
if ( pv->parser != NULL )
{
len = av_parser_parse2(pv->parser, pv->context, &pout, &pout_len,
in->data + pos, in->size - pos,
pts, pts, 0 );
parser_pts = pv->parser->pts;
pts = AV_NOPTS_VALUE;
}
else
{
pout = in->data;
len = pout_len = in->size;
parser_pts = in->s.start;
}
if (pout != NULL && pout_len > 0)
{
pv->packet_info.data = pout;
pv->packet_info.size = pout_len;
pv->packet_info.pts = parser_pts;
decodeAudio(pv, &pv->packet_info);
// There could have been an unfinished packet when we entered
// decodeAudio that is now finished. The next packet is associated
// with the input buffer, so set it's chapter and scr info.
pv->packet_info.scr_sequence = in->s.scr_sequence;
pv->unfinished = 0;
}
if (len > 0 && pout_len <= 0)
{
pv->unfinished = 1;
}
}
*buf_out = hb_buffer_list_clear(&pv->list);
return HB_WORK_OK;
}
static int decavcodecaInfo( hb_work_object_t *w, hb_work_info_t *info )
{
hb_work_private_t *pv = w->private_data;
memset( info, 0, sizeof(*info) );
if ( pv && pv->context )
{
AVCodecContext *context = pv->context;
info->bitrate = context->bit_rate;
info->rate.num = context->time_base.num;
info->rate.den = context->time_base.den;
info->profile = context->profile;
info->level = context->level;
return 1;
}
return 0;
}
static int parse_adts_extradata( hb_audio_t * audio, AVCodecContext * context,
AVPacket * pkt )
{
const AVBitStreamFilter * bsf;
AVBSFContext * ctx = NULL;
int ret;
bsf = av_bsf_get_by_name("aac_adtstoasc");
ret = av_bsf_alloc(bsf, &ctx);
if (ret < 0)
{
hb_error("decavcodec: bitstream filter alloc failure");
return ret;
}
ctx->time_base_in.num = 1;
ctx->time_base_in.den = audio->config.out.samplerate;
avcodec_parameters_from_context(ctx->par_in, context);
ret = av_bsf_init(ctx);
if (ret < 0)
{
hb_error("decavcodec: bitstream filter init failure");
av_bsf_free(&ctx);
return ret;
}
ret = av_bsf_send_packet(ctx, pkt);
if (ret < 0)
{
hb_error("decavcodec: av_bsf_send_packet failure");
av_bsf_free(&ctx);
return ret;
}
ret = av_bsf_receive_packet(ctx, pkt);
av_bsf_free(&ctx);
if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
{
return 0;
}
else if (ret < 0)
{
if (ret != AVERROR_INVALIDDATA)
{
hb_error("decavcodec: av_bsf_receive_packet failure %x", -ret);
}
return ret;
}
if (audio->priv.config.extradata.length == 0)
{
const uint8_t * extradata;
int size;
extradata = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
&size);
if (extradata != NULL && size > 0)
{
int len;
len = MIN(size, HB_CONFIG_MAX_SIZE);
memcpy(audio->priv.config.extradata.bytes, extradata, len);
audio->priv.config.extradata.length = len;
}
}
return 0;
}
static int decavcodecaBSInfo( hb_work_object_t *w, const hb_buffer_t *buf,
hb_work_info_t *info )
{
hb_work_private_t *pv = w->private_data;
int result = 0, done = 0;
hb_audio_t *audio = w->audio;
memset( info, 0, sizeof(*info) );
if ( pv && pv->context )
{
return decavcodecaInfo( w, info );
}
AVCodec *codec = avcodec_find_decoder( w->codec_param );
if ( ! codec )
{
// there's no ffmpeg codec for this audio type - give up
return -1;
}
static char codec_name[64];
info->name = strncpy( codec_name, codec->name, sizeof(codec_name)-1 );
AVCodecContext *context = avcodec_alloc_context3(codec);
AVCodecParserContext *parser = NULL;
if (w->title && w->title->opaque_priv != NULL)
{
AVFormatContext *ic = (AVFormatContext*)w->title->opaque_priv;
avcodec_parameters_to_context(context,
ic->streams[audio->id]->codecpar);
// libav's eac3 parser toggles the codec_id in the context as
// it reads eac3 data between AV_CODEC_ID_AC3 and AV_CODEC_ID_EAC3.
// It detects an AC3 sync pattern sometimes in ac3_sync() which
// causes it to eventually set avctx->codec_id to AV_CODEC_ID_AC3
// in ff_aac_ac3_parse(). Since we are parsing some data before
// we get here, the codec_id may have flipped. This will cause an
// error in hb_avcodec_open(). So flip it back!
context->codec_id = w->codec_param;
}
else
{
parser = av_parser_init(codec->id);
}
hb_ff_set_sample_fmt( context, codec, AV_SAMPLE_FMT_FLT );
AVDictionary * av_opts = NULL;
av_dict_set( &av_opts, "err_detect", "crccheck+explode", 0 );
if ( hb_avcodec_open( context, codec, &av_opts, 0 ) )
{
av_dict_free( &av_opts );
return -1;
}
if (audio != NULL)
{
context->pkt_timebase.num = audio->config.in.timebase.num;
context->pkt_timebase.den = audio->config.in.timebase.den;
}
av_dict_free( &av_opts );
unsigned char *parse_buffer;
int parse_pos, parse_buffer_size;
while (buf != NULL && !done)
{
parse_pos = 0;
while (parse_pos < buf->size && !done)
{
int parse_len, truehd_mono = 0, ret;
if (parser != NULL)
{
parse_len = av_parser_parse2(parser, context,
&parse_buffer, &parse_buffer_size,
buf->data + parse_pos, buf->size - parse_pos,
buf->s.start, buf->s.start, 0);
}
else
{
parse_buffer = buf->data + parse_pos;
parse_len = parse_buffer_size = buf->size - parse_pos;
}
if (parse_buffer_size == 0)
{
parse_pos += parse_len;
continue;
}
// libavcodec can't decode TrueHD Mono (bug #356)
// work around it by requesting Stereo before decoding
if (context->codec_id == AV_CODEC_ID_TRUEHD &&
context->channel_layout == AV_CH_LAYOUT_MONO)
{
truehd_mono = 1;
context->request_channel_layout = AV_CH_LAYOUT_STEREO;
}
else
{
context->request_channel_layout = 0;
}
AVPacket avp;
av_init_packet(&avp);
avp.data = parse_buffer;
avp.size = parse_buffer_size;
ret = avcodec_send_packet(context, &avp);
if (ret < 0 && ret != AVERROR_EOF)
{
parse_pos += parse_len;
av_packet_unref(&avp);
continue;
}
AVFrame *frame = NULL;
do
{
if (frame == NULL)
{
frame = av_frame_alloc();
}
ret = avcodec_receive_frame(context, frame);
if (ret >= 0)
{
// libavcoded doesn't consistently set frame->sample_rate
if (frame->sample_rate != 0)
{
info->rate.num = frame->sample_rate;
}
else
{
info->rate.num = context->sample_rate;
hb_log("decavcodecaBSInfo: warning: invalid frame sample_rate! Using context sample_rate.");
}
info->rate.den = 1;
info->samples_per_frame = frame->nb_samples;
info->sample_bit_depth = context->bits_per_raw_sample;
int bps = av_get_bits_per_sample(context->codec_id);
int channels;
if (frame->channel_layout != 0)
{
channels = av_get_channel_layout_nb_channels(
frame->channel_layout);
}
else
{
channels = frame->channels;
}
info->bitrate = bps * channels * info->rate.num;
if (info->bitrate <= 0)
{
if (context->bit_rate > 0)
{
info->bitrate = context->bit_rate;
}
else
{
info->bitrate = 1;
}
}
if (truehd_mono)
{
info->channel_layout = AV_CH_LAYOUT_MONO;
info->matrix_encoding = AV_MATRIX_ENCODING_NONE;
}
else
{
AVFrameSideData *side_data;
if ((side_data =
av_frame_get_side_data(frame,
AV_FRAME_DATA_MATRIXENCODING)) != NULL)
{
info->matrix_encoding = *side_data->data;
}
else
{
info->matrix_encoding = AV_MATRIX_ENCODING_NONE;
}
if (info->matrix_encoding == AV_MATRIX_ENCODING_DOLBY ||
info->matrix_encoding == AV_MATRIX_ENCODING_DPLII)
{
info->channel_layout = AV_CH_LAYOUT_STEREO_DOWNMIX;
}
else
{
info->channel_layout = frame->channel_layout;
}
}
if (info->channel_layout == 0)
{
// Channel layout was not set. Guess a layout based
// on number of channels.
info->channel_layout = av_get_default_channel_layout(
frame->channels);
}
if (context->codec_id == AV_CODEC_ID_AC3 ||
context->codec_id == AV_CODEC_ID_EAC3)
{
if (context->audio_service_type == AV_AUDIO_SERVICE_TYPE_KARAOKE)
{
info->mode = 7;
}
else
{
info->mode = context->audio_service_type;
}
}
else if (context->codec_id == AV_CODEC_ID_AAC &&
context->extradata_size == 0)
{
// Parse ADTS AAC streams for AudioSpecificConfig.
// This data is required in order to write
// proper headers in MP4 and MKV files.
parse_adts_extradata(audio, context, &avp);
}
result = 1;
done = 1;
av_frame_unref(frame);
break;
}
} while (ret >= 0);
av_packet_unref(&avp);
av_frame_free(&frame);
parse_pos += parse_len;
}
buf = buf->next;
}
info->profile = context->profile;
info->level = context->level;
info->channel_map = &hb_libav_chan_map;
if ( parser != NULL )
av_parser_close( parser );
hb_avcodec_free_context(&context);
return result;
}
reordered_data_t *
reordered_hash_rem(hb_work_private_t * pv, int64_t sequence)
{
reordered_data_t * reordered;
int slot = sequence & REORDERED_HASH_MASK;
reordered = pv->reordered_hash[slot];
if (reordered == NULL)
{
// This shouldn't happen...
// But, this happens sometimes when libav outputs exactly the same
// frame twice for some reason.
hb_deep_log(3, "decavcodec: missing sequence %"PRId64"", sequence);
}
pv->reordered_hash[slot] = NULL;
return reordered;
}
void
reordered_hash_add(hb_work_private_t * pv, reordered_data_t * reordered)
{
int slot = reordered->sequence & REORDERED_HASH_MASK;
// Free any unused previous entries.
// This can happen due to libav parser feeding partial
// frames data to the decoder.
// It can also happen due to decoding errors.
free(pv->reordered_hash[slot]);
pv->reordered_hash[slot] = reordered;
}
/* -------------------------------------------------------------
* General purpose video decoder using libavcodec
*/
// send cc_buf to the CC decoder(s)
static void cc_send_to_decoder(hb_work_private_t *pv, hb_buffer_t *buf)
{
if (buf == NULL)
return;
// if there's more than one decoder for the captions send a copy
// of the buffer to all.
hb_subtitle_t *subtitle;
int ii = 0, n = hb_list_count(pv->list_subtitle);
while (--n > 0)
{
// make a copy of the buf then forward it to the decoder
hb_buffer_t *cpy = hb_buffer_dup(buf);
subtitle = hb_list_item(pv->list_subtitle, ii++);
hb_fifo_push(subtitle->fifo_in, cpy);
}
subtitle = hb_list_item(pv->list_subtitle, ii);
hb_fifo_push( subtitle->fifo_in, buf );
}
static hb_buffer_t * cc_fill_buffer(hb_work_private_t *pv, uint8_t *cc, int size)
{
int cc_count[4] = {0,};
int ii;
hb_buffer_t *buf = NULL;
for (ii = 0; ii < size; ii += 3)
{
if ((cc[ii] & 0x04) == 0) // not valid
continue;
if ((cc[ii+1] & 0x7f) == 0 && (cc[ii+2] & 0x7f) == 0) // stuffing
continue;
int type = cc[ii] & 0x03;
cc_count[type]++;
}
// Only handles CC1 for now.
if (cc_count[0] > 0)
{
buf = hb_buffer_init(cc_count[0] * 2);
int jj = 0;
for (ii = 0; ii < size; ii += 3)
{
if ((cc[ii] & 0x04) == 0) // not valid
continue;
if ((cc[ii+1] & 0x7f) == 0 && (cc[ii+2] & 0x7f) == 0) // stuffing
continue;
int type = cc[ii] & 0x03;
if (type == 0)
{
buf->data[jj++] = cc[ii+1];
buf->data[jj++] = cc[ii+2];
}
}
}
return buf;
}
// copy one video frame into an HB buf. If the frame isn't in our color space
// or at least one of its dimensions is odd, use sws_scale to convert/rescale it.
// Otherwise just copy the bits.
static hb_buffer_t *copy_frame( hb_work_private_t *pv )
{
reordered_data_t * reordered = NULL;
hb_buffer_t * out;
#ifdef USE_QSV
// no need to copy the frame data when decoding with QSV to opaque memory
if (pv->qsv.decode &&
pv->qsv.config.io_pattern == MFX_IOPATTERN_OUT_OPAQUE_MEMORY)
{
out = hb_frame_buffer_init(pv->frame->format, pv->frame->width, pv->frame->height);
hb_avframe_set_video_buffer_flags(out, pv->frame, (AVRational){1,1});
out->qsv_details.qsv_atom = pv->frame->data[2];
out->qsv_details.ctx = pv->job->qsv.ctx;
}
else
#endif
{
out = hb_avframe_to_video_buffer(pv->frame, (AVRational){1,1});
}
if (pv->frame->pts != AV_NOPTS_VALUE)
{
reordered = reordered_hash_rem(pv, pv->frame->pts);
}
if (reordered != NULL)
{
out->s.scr_sequence = reordered->scr_sequence;
out->s.start = reordered->pts;
out->s.new_chap = reordered->new_chap;
pv->last_scr_sequence = reordered->scr_sequence;
pv->last_chapter = reordered->new_chap;
free(reordered);
}
else
{
out->s.scr_sequence = pv->last_scr_sequence;
out->s.start = AV_NOPTS_VALUE;
}
double frame_dur = pv->duration;
if (pv->frame->repeat_pict)
{
frame_dur += pv->frame->repeat_pict * pv->field_duration;
}
if (out->s.start == AV_NOPTS_VALUE)
{
out->s.start = pv->next_pts;