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avcodec/libvpxenc: add VP9 temporal scalability encoding option 

This commit reuses the configuration options for VP8 that enables
temporal scalability for VP9. It also adds a way to enable three
preset temporal structures (refer to the documentation for more
detail) that can be used in offline encoding.

Signed-off-by: James Zern <jzern@google.com>
tags/n4.3
Wonkap Jang James Zern 6 years ago
parent
c4e29d0ba3
commit
b93098253e
3 changed files with 243 additions and 27 deletions
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  1. +15
    -3
      doc/encoders.texi
  2. +227
    -23
      libavcodec/libvpxenc.c
  3. +1
    -1
      libavcodec/version.h

+ 15
- 3
doc/encoders.texi View File

@@ -1888,8 +1888,6 @@ Enable error resiliency features.
Increase sharpness at the expense of lower PSNR.
The valid range is [0, 7].

@item VP8-specific options
@table @option
@item ts-parameters
Sets the temporal scalability configuration using a :-separated list of
key=value pairs. For example, to specify temporal scalability parameters
@@ -1897,7 +1895,7 @@ with @code{ffmpeg}:
@example
ffmpeg -i INPUT -c:v libvpx -ts-parameters ts_number_layers=3:\
ts_target_bitrate=250,500,1000:ts_rate_decimator=4,2,1:\
ts_periodicity=4:ts_layer_id=0,2,1,2 OUTPUT
ts_periodicity=4:ts_layer_id=0,2,1,2:ts_layering_mode=3 OUTPUT
@end example
Below is a brief explanation of each of the parameters, please
refer to @code{struct vpx_codec_enc_cfg} in @code{vpx/vpx_encoder.h} for more
@@ -1914,6 +1912,20 @@ Frame rate decimation factor for each temporal layer.
Length of the sequence defining frame temporal layer membership.
@item ts_layer_id
Template defining the membership of frames to temporal layers.
@item ts_layering_mode
(optional) Selecting the temporal structure from a set of pre-defined temporal layering modes.
Currently supports the following options.
@table @option
@item 0
No temporal layering flags are provided internally,
relies on flags being passed in using metadata in AVFrame.
@item 2
Two temporal layers. 0-1...
@item 3
Three temporal layers. 0-2-1-2...; with single reference frame.
@item 4
Same as option "3", except there is a dependency between
the two temporal layer 2 frames within the temporal period.
@end table
@end table



+ 227
- 23
libavcodec/libvpxenc.c View File

@@ -100,7 +100,9 @@ typedef struct VPxEncoderContext {
int rc_undershoot_pct;
int rc_overshoot_pct;

AVDictionary *vp8_ts_parameters;
AVDictionary *vpx_ts_parameters;
int *ts_layer_flags;
int current_temporal_idx;

// VP9-only
int lossless;
@@ -137,6 +139,7 @@ static const char *const ctlidstr[] = {
[VP8E_SET_CQ_LEVEL] = "VP8E_SET_CQ_LEVEL",
[VP8E_SET_MAX_INTRA_BITRATE_PCT] = "VP8E_SET_MAX_INTRA_BITRATE_PCT",
[VP8E_SET_SHARPNESS] = "VP8E_SET_SHARPNESS",
[VP8E_SET_TEMPORAL_LAYER_ID] = "VP8E_SET_TEMPORAL_LAYER_ID",
#if CONFIG_LIBVPX_VP9_ENCODER
[VP9E_SET_LOSSLESS] = "VP9E_SET_LOSSLESS",
[VP9E_SET_TILE_COLUMNS] = "VP9E_SET_TILE_COLUMNS",
@@ -144,6 +147,11 @@ static const char *const ctlidstr[] = {
[VP9E_SET_FRAME_PARALLEL_DECODING] = "VP9E_SET_FRAME_PARALLEL_DECODING",
[VP9E_SET_AQ_MODE] = "VP9E_SET_AQ_MODE",
[VP9E_SET_COLOR_SPACE] = "VP9E_SET_COLOR_SPACE",
[VP9E_SET_SVC_LAYER_ID] = "VP9E_SET_SVC_LAYER_ID",
#if VPX_ENCODER_ABI_VERSION >= 12
[VP9E_SET_SVC_PARAMETERS] = "VP9E_SET_SVC_PARAMETERS",
#endif
[VP9E_SET_SVC] = "VP9E_SET_SVC",
#if VPX_ENCODER_ABI_VERSION >= 11
[VP9E_SET_COLOR_RANGE] = "VP9E_SET_COLOR_RANGE",
#endif
@@ -221,10 +229,22 @@ static av_cold void dump_enc_cfg(AVCodecContext *avctx,
width, "rc_overshoot_pct:", cfg->rc_overshoot_pct);
av_log(avctx, level, "temporal layering settings\n"
" %*s%u\n", width, "ts_number_layers:", cfg->ts_number_layers);
av_log(avctx, level,
"\n %*s", width, "ts_target_bitrate:");
for (i = 0; i < VPX_TS_MAX_LAYERS; i++)
av_log(avctx, level, "%u ", cfg->ts_target_bitrate[i]);
if (avctx->codec_id == AV_CODEC_ID_VP8) {
av_log(avctx, level,
"\n %*s", width, "ts_target_bitrate:");
for (i = 0; i < VPX_TS_MAX_LAYERS; i++)
av_log(avctx, level,
"%u ", cfg->ts_target_bitrate[i]);
}
#if (VPX_ENCODER_ABI_VERSION >= 12) && CONFIG_LIBVPX_VP9_ENCODER
if (avctx->codec_id == AV_CODEC_ID_VP9) {
av_log(avctx, level,
"\n %*s", width, "layer_target_bitrate:");
for (i = 0; i < VPX_TS_MAX_LAYERS; i++)
av_log(avctx, level,
"%u ", cfg->layer_target_bitrate[i]);
}
#endif
av_log(avctx, level, "\n");
av_log(avctx, level,
"\n %*s", width, "ts_rate_decimator:");
@@ -346,6 +366,8 @@ static av_cold int vpx_free(AVCodecContext *avctx)
}
#endif

av_freep(&ctx->ts_layer_flags);

vpx_codec_destroy(&ctx->encoder);
if (ctx->is_alpha) {
vpx_codec_destroy(&ctx->encoder_alpha);
@@ -370,23 +392,149 @@ static void vp8_ts_parse_int_array(int *dest, char *value, size_t value_len, int
}
}

static int vp8_ts_param_parse(struct vpx_codec_enc_cfg *enccfg, char *key, char *value)
static void set_temporal_layer_pattern(int layering_mode, vpx_codec_enc_cfg_t *cfg,
int *layer_flags, int *flag_periodicity)
{
switch (layering_mode) {
case 2: {
/**
* 2-layers, 2-frame period.
*/
static const int ids[2] = { 0, 1 };
cfg->ts_periodicity = 2;
*flag_periodicity = 2;
cfg->ts_number_layers = 2;
cfg->ts_rate_decimator[0] = 2;
cfg->ts_rate_decimator[1] = 1;
memcpy(cfg->ts_layer_id, ids, sizeof(ids));

layer_flags[0] =
VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_ARF |
VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF;
layer_flags[1] =
VP8_EFLAG_NO_UPD_ARF | VP8_EFLAG_NO_UPD_GF |
VP8_EFLAG_NO_UPD_LAST |
VP8_EFLAG_NO_REF_ARF | VP8_EFLAG_NO_REF_GF;
break;
}
case 3: {
/**
* 3-layers structure with one reference frame.
* This works same as temporal_layering_mode 3.
*
* 3-layers, 4-frame period.
*/
static const int ids[4] = { 0, 2, 1, 2 };
cfg->ts_periodicity = 4;
*flag_periodicity = 4;
cfg->ts_number_layers = 3;
cfg->ts_rate_decimator[0] = 4;
cfg->ts_rate_decimator[1] = 2;
cfg->ts_rate_decimator[2] = 1;
memcpy(cfg->ts_layer_id, ids, sizeof(ids));

/**
* 0=L, 1=GF, 2=ARF,
* Intra-layer prediction disabled.
*/
layer_flags[0] =
VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_ARF |
VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF;
layer_flags[1] =
VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_ARF |
VP8_EFLAG_NO_UPD_LAST | VP8_EFLAG_NO_UPD_GF |
VP8_EFLAG_NO_UPD_ARF;
layer_flags[2] =
VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_ARF |
VP8_EFLAG_NO_UPD_ARF | VP8_EFLAG_NO_UPD_LAST;
layer_flags[3] =
VP8_EFLAG_NO_REF_LAST | VP8_EFLAG_NO_REF_ARF |
VP8_EFLAG_NO_UPD_LAST | VP8_EFLAG_NO_UPD_GF |
VP8_EFLAG_NO_UPD_ARF;
break;
}
case 4: {
/**
* 3-layers structure.
* added dependency between the two TL2 frames (on top of case 3).
* 3-layers, 4-frame period.
*/
static const int ids[4] = { 0, 2, 1, 2 };
cfg->ts_periodicity = 4;
*flag_periodicity = 4;
cfg->ts_number_layers = 3;
cfg->ts_rate_decimator[0] = 4;
cfg->ts_rate_decimator[1] = 2;
cfg->ts_rate_decimator[2] = 1;
memcpy(cfg->ts_layer_id, ids, sizeof(ids));

/**
* 0=L, 1=GF, 2=ARF, Intra-layer prediction disabled.
*/
layer_flags[0] =
VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_ARF |
VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF;
layer_flags[1] =
VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_ARF |
VP8_EFLAG_NO_UPD_LAST | VP8_EFLAG_NO_UPD_GF;
layer_flags[2] =
VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_ARF |
VP8_EFLAG_NO_UPD_ARF | VP8_EFLAG_NO_UPD_LAST;
layer_flags[3] =
VP8_EFLAG_NO_REF_LAST |
VP8_EFLAG_NO_UPD_LAST | VP8_EFLAG_NO_UPD_GF |
VP8_EFLAG_NO_UPD_ARF;
break;
}
default:
/**
* do not change the layer_flags or the flag_periodicity in this case;
* it might be that the code is using external flags to be used.
*/
break;

}
}

static int vpx_ts_param_parse(VPxContext *ctx, struct vpx_codec_enc_cfg *enccfg,
char *key, char *value, enum AVCodecID codec_id)
{
size_t value_len = strlen(value);
int ts_layering_mode = 0;

if (!value_len)
return -1;

if (!strcmp(key, "ts_number_layers"))
enccfg->ts_number_layers = strtoul(value, &value, 10);
else if (!strcmp(key, "ts_target_bitrate"))
vp8_ts_parse_int_array(enccfg->ts_target_bitrate, value, value_len, VPX_TS_MAX_LAYERS);
else if (!strcmp(key, "ts_rate_decimator"))
vp8_ts_parse_int_array(enccfg->ts_rate_decimator, value, value_len, VPX_TS_MAX_LAYERS);
else if (!strcmp(key, "ts_periodicity"))
else if (!strcmp(key, "ts_target_bitrate")) {
if (codec_id == AV_CODEC_ID_VP8)
vp8_ts_parse_int_array(enccfg->ts_target_bitrate, value, value_len, VPX_TS_MAX_LAYERS);
#if (VPX_ENCODER_ABI_VERSION >= 12) && CONFIG_LIBVPX_VP9_ENCODER
if (codec_id == AV_CODEC_ID_VP9)
vp8_ts_parse_int_array(enccfg->layer_target_bitrate, value, value_len, VPX_TS_MAX_LAYERS);
#endif
} else if (!strcmp(key, "ts_rate_decimator")) {
vp8_ts_parse_int_array(enccfg->ts_rate_decimator, value, value_len, VPX_TS_MAX_LAYERS);
} else if (!strcmp(key, "ts_periodicity")) {
enccfg->ts_periodicity = strtoul(value, &value, 10);
else if (!strcmp(key, "ts_layer_id"))
} else if (!strcmp(key, "ts_layer_id")) {
vp8_ts_parse_int_array(enccfg->ts_layer_id, value, value_len, VPX_TS_MAX_PERIODICITY);
} else if (!strcmp(key, "ts_layering_mode")) {
/* option for pre-defined temporal structures in function set_temporal_layer_pattern. */
ts_layering_mode = strtoul(value, &value, 4);
}

#if (VPX_ENCODER_ABI_VERSION >= 12) && CONFIG_LIBVPX_VP9_ENCODER
enccfg->temporal_layering_mode = VP9E_TEMPORAL_LAYERING_MODE_BYPASS; // only bypass mode is supported for now.
enccfg->ss_number_layers = 1; // TODO: add spatial scalability support.
#endif
if (ts_layering_mode) {
// make sure the ts_layering_mode comes at the end of the ts_parameter string to ensure that
// correct configuration is done.
ctx->ts_layer_flags = av_malloc_array(VPX_TS_MAX_PERIODICITY, sizeof(*ctx->ts_layer_flags));
set_temporal_layer_pattern(ts_layering_mode, enccfg, ctx->ts_layer_flags, &enccfg->ts_periodicity);
}

return 0;
}
@@ -590,7 +738,9 @@ static av_cold int vpx_init(AVCodecContext *avctx,
vpx_img_fmt_t img_fmt = VPX_IMG_FMT_I420;
#if CONFIG_LIBVPX_VP9_ENCODER
vpx_codec_caps_t codec_caps = vpx_codec_get_caps(iface);
vpx_svc_extra_cfg_t svc_params;
#endif
AVDictionaryEntry* en = NULL;

av_log(avctx, AV_LOG_INFO, "%s\n", vpx_codec_version_str());
av_log(avctx, AV_LOG_VERBOSE, "%s\n", vpx_codec_build_config());
@@ -648,6 +798,9 @@ static av_cold int vpx_init(AVCodecContext *avctx,
if (avctx->bit_rate) {
enccfg.rc_target_bitrate = av_rescale_rnd(avctx->bit_rate, 1, 1000,
AV_ROUND_NEAR_INF);
#if CONFIG_LIBVPX_VP9_ENCODER
enccfg.ss_target_bitrate[0] = enccfg.rc_target_bitrate;
#endif
} else {
// Set bitrate to default value. Also sets CRF to default if needed.
set_vpx_defaults(avctx, &enccfg);
@@ -757,14 +910,11 @@ FF_ENABLE_DEPRECATION_WARNINGS

enccfg.g_error_resilient = ctx->error_resilient || ctx->flags & VP8F_ERROR_RESILIENT;

if (CONFIG_LIBVPX_VP8_ENCODER && avctx->codec_id == AV_CODEC_ID_VP8) {
AVDictionaryEntry* en = NULL;
while ((en = av_dict_get(ctx->vp8_ts_parameters, "", en, AV_DICT_IGNORE_SUFFIX))) {
if (vp8_ts_param_parse(&enccfg, en->key, en->value) < 0)
av_log(avctx, AV_LOG_WARNING,
"Error parsing option '%s = %s'.\n",
en->key, en->value);
}
while ((en = av_dict_get(ctx->vpx_ts_parameters, "", en, AV_DICT_IGNORE_SUFFIX))) {
if (vpx_ts_param_parse(ctx, &enccfg, en->key, en->value, avctx->codec_id) < 0)
av_log(avctx, AV_LOG_WARNING,
"Error parsing option '%s = %s'.\n",
en->key, en->value);
}

dump_enc_cfg(avctx, &enccfg);
@@ -774,7 +924,21 @@ FF_ENABLE_DEPRECATION_WARNINGS
log_encoder_error(avctx, "Failed to initialize encoder");
return AVERROR(EINVAL);
}

#if CONFIG_LIBVPX_VP9_ENCODER
if (avctx->codec_id == AV_CODEC_ID_VP9 && enccfg.ts_number_layers > 1) {
memset(&svc_params, 0, sizeof(svc_params));
for (int i = 0; i < enccfg.ts_number_layers; ++i) {
svc_params.max_quantizers[i] = enccfg.rc_max_quantizer;
svc_params.min_quantizers[i] = enccfg.rc_min_quantizer;
}
svc_params.scaling_factor_num[0] = enccfg.g_h;
svc_params.scaling_factor_den[0] = enccfg.g_h;
#if VPX_ENCODER_ABI_VERSION >= 12
codecctl_int(avctx, VP9E_SET_SVC, 1);
codecctl_intp(avctx, VP9E_SET_SVC_PARAMETERS, (int *)&svc_params);
#endif
}
#endif
if (ctx->is_alpha) {
enccfg_alpha = enccfg;
res = vpx_codec_enc_init(&ctx->encoder_alpha, iface, &enccfg_alpha, flags);
@@ -1321,6 +1485,9 @@ static int vpx_encode(AVCodecContext *avctx, AVPacket *pkt,
int64_t timestamp = 0;
int res, coded_size;
vpx_enc_frame_flags_t flags = 0;
const struct vpx_codec_enc_cfg *enccfg = ctx->encoder.config.enc;
vpx_svc_layer_id_t layer_id;
int layer_id_valid = 0;

if (frame) {
const AVFrameSideData *sd = av_frame_get_side_data(frame, AV_FRAME_DATA_REGIONS_OF_INTEREST);
@@ -1368,6 +1535,42 @@ static int vpx_encode(AVCodecContext *avctx, AVPacket *pkt,
}
}

// this is for encoding with preset temporal layering patterns defined in
// set_temporal_layer_pattern function.
if (enccfg->ts_number_layers > 1 && ctx->ts_layer_flags) {
if (flags & VPX_EFLAG_FORCE_KF) {
// keyframe, reset temporal layering.
ctx->current_temporal_idx = 0;
flags = VPX_EFLAG_FORCE_KF;
} else {
flags = 0;
}

/* get the flags from the temporal layer configuration. */
flags |= ctx->ts_layer_flags[ctx->current_temporal_idx];

memset(&layer_id, 0, sizeof(layer_id));
#if VPX_ENCODER_ABI_VERSION >= 12
layer_id.spatial_layer_id = 0;
#endif
layer_id.temporal_layer_id = enccfg->ts_layer_id[ctx->current_temporal_idx];
#ifdef VPX_CTRL_VP9E_SET_MAX_INTER_BITRATE_PCT
layer_id.temporal_layer_id_per_spatial[0] = layer_id.temporal_layer_id;
#endif
layer_id_valid = 1;
}

if (layer_id_valid) {
if (avctx->codec_id == AV_CODEC_ID_VP8) {
codecctl_int(avctx, VP8E_SET_TEMPORAL_LAYER_ID, layer_id.temporal_layer_id);
}
#if CONFIG_LIBVPX_VP9_ENCODER && VPX_ENCODER_ABI_VERSION >= 12
else if (avctx->codec_id == AV_CODEC_ID_VP9) {
codecctl_intp(avctx, VP9E_SET_SVC_LAYER_ID, (int *)&layer_id);
}
#endif
}

res = vpx_codec_encode(&ctx->encoder, rawimg, timestamp,
avctx->ticks_per_frame, flags, ctx->deadline);
if (res != VPX_CODEC_OK) {
@@ -1397,6 +1600,8 @@ static int vpx_encode(AVCodecContext *avctx, AVPacket *pkt,
}
av_base64_encode(avctx->stats_out, b64_size, ctx->twopass_stats.buf,
ctx->twopass_stats.sz);
} else if (enccfg->ts_number_layers > 1 && ctx->ts_layer_flags) {
ctx->current_temporal_idx = (ctx->current_temporal_idx + 1) % enccfg->ts_periodicity;
}

*got_packet = !!coded_size;
@@ -1435,6 +1640,7 @@ static int vpx_encode(AVCodecContext *avctx, AVPacket *pkt,
{ "noise-sensitivity", "Noise sensitivity", OFFSET(noise_sensitivity), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 4, VE}, \
{ "undershoot-pct", "Datarate undershoot (min) target (%)", OFFSET(rc_undershoot_pct), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 100, VE }, \
{ "overshoot-pct", "Datarate overshoot (max) target (%)", OFFSET(rc_overshoot_pct), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1000, VE }, \
{ "ts-parameters", "Temporal scaling configuration using a :-separated list of key=value parameters", OFFSET(vpx_ts_parameters), AV_OPT_TYPE_DICT, {.str=NULL}, 0, 0, VE}, \

#define LEGACY_OPTIONS \
{"speed", "", offsetof(VPxContext, cpu_used), AV_OPT_TYPE_INT, {.i64 = 1}, -16, 16, VE}, \
@@ -1454,8 +1660,6 @@ static const AVOption vp8_options[] = {
{ "auto-alt-ref", "Enable use of alternate reference "
"frames (2-pass only)", OFFSET(auto_alt_ref), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 2, VE},
{ "cpu-used", "Quality/Speed ratio modifier", OFFSET(cpu_used), AV_OPT_TYPE_INT, {.i64 = 1}, -16, 16, VE},
{ "ts-parameters", "Temporal scaling configuration using a "
":-separated list of key=value parameters", OFFSET(vp8_ts_parameters), AV_OPT_TYPE_DICT, {.str=NULL}, 0, 0, VE},
LEGACY_OPTIONS
{ NULL }
};


+ 1
- 1
libavcodec/version.h View File

@@ -29,7 +29,7 @@

#define LIBAVCODEC_VERSION_MAJOR 58
#define LIBAVCODEC_VERSION_MINOR 67
#define LIBAVCODEC_VERSION_MICRO 100
#define LIBAVCODEC_VERSION_MICRO 101

#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \


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