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/*
* Copyright (c) 2010, Google, Inc.
*
* 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
*/
/**
* @file
* VP8/9 decoder support via libvpx
*/
#include "config_components.h"
#define VPX_CODEC_DISABLE_COMPAT 1
#include <vpx/vpx_decoder.h>
#include <vpx/vpx_frame_buffer.h>
#include <vpx/vp8dx.h>
#include "libavutil/common.h"
#include "libavutil/cpu.h"
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "decode.h"
#include "libvpx.h"
#include "profiles.h"
typedef struct VPxDecoderContext {
struct vpx_codec_ctx decoder;
struct vpx_codec_ctx decoder_alpha;
AVBufferPool *pool;
size_t pool_size;
int has_alpha_channel;
} VPxContext;
static int get_frame_buffer(void *priv, size_t min_size, vpx_codec_frame_buffer_t *fb)
{
VPxContext *ctx = priv;
AVBufferRef *buf;
if (min_size > ctx->pool_size) {
av_buffer_pool_uninit(&ctx->pool);
/* According to the libvpx docs the buffer must be zeroed out. */
ctx->pool = av_buffer_pool_init(min_size, av_buffer_allocz);
if (!ctx->pool) {
ctx->pool_size = 0;
return AVERROR(ENOMEM);
}
ctx->pool_size = min_size;
}
buf = av_buffer_pool_get(ctx->pool);
if (!buf)
return AVERROR(ENOMEM);
fb->priv = buf;
fb->size = ctx->pool_size;
fb->data = buf->data;
return 0;
}
static int release_frame_buffer(void *priv, vpx_codec_frame_buffer_t *fb)
{
AVBufferRef *buf = fb->priv;
av_buffer_unref(&buf);
return 0;
}
static av_cold int vpx_init(AVCodecContext *avctx,
struct vpx_codec_ctx* decoder,
const struct vpx_codec_iface *iface)
{
struct vpx_codec_dec_cfg deccfg = {
.threads = FFMIN(avctx->thread_count ? avctx->thread_count : av_cpu_count(), MAX_VPX_THREADS)
};
av_log(avctx, AV_LOG_INFO, "%s\n", vpx_codec_version_str());
av_log(avctx, AV_LOG_VERBOSE, "%s\n", vpx_codec_build_config());
if (vpx_codec_dec_init(decoder, iface, &deccfg, 0) != VPX_CODEC_OK) {
const char *error = vpx_codec_error(decoder);
av_log(avctx, AV_LOG_ERROR, "Failed to initialize decoder: %s\n",
error);
return AVERROR(EINVAL);
}
if (avctx->codec_id == AV_CODEC_ID_VP9)
vpx_codec_set_frame_buffer_functions(decoder, get_frame_buffer, release_frame_buffer, avctx->priv_data);
return 0;
}
// returns 0 on success, AVERROR_INVALIDDATA otherwise
static int set_pix_fmt(AVCodecContext *avctx, struct vpx_image *img,
int has_alpha_channel)
{
static const enum AVColorSpace colorspaces[8] = {
AVCOL_SPC_UNSPECIFIED, AVCOL_SPC_BT470BG, AVCOL_SPC_BT709, AVCOL_SPC_SMPTE170M,
AVCOL_SPC_SMPTE240M, AVCOL_SPC_BT2020_NCL, AVCOL_SPC_RESERVED, AVCOL_SPC_RGB,
};
#if VPX_IMAGE_ABI_VERSION >= 4
static const enum AVColorRange color_ranges[] = {
AVCOL_RANGE_MPEG, AVCOL_RANGE_JPEG
};
avctx->color_range = color_ranges[img->range];
#endif
avctx->colorspace = colorspaces[img->cs];
if (avctx->codec_id == AV_CODEC_ID_VP8 && img->fmt != VPX_IMG_FMT_I420)
return AVERROR_INVALIDDATA;
switch (img->fmt) {
case VPX_IMG_FMT_I420:
if (avctx->codec_id == AV_CODEC_ID_VP9)
avctx->profile = AV_PROFILE_VP9_0;
avctx->pix_fmt =
has_alpha_channel ? AV_PIX_FMT_YUVA420P : AV_PIX_FMT_YUV420P;
return 0;
#if CONFIG_LIBVPX_VP9_DECODER
case VPX_IMG_FMT_I422:
avctx->profile = AV_PROFILE_VP9_1;
avctx->pix_fmt = AV_PIX_FMT_YUV422P;
return 0;
case VPX_IMG_FMT_I440:
avctx->profile = AV_PROFILE_VP9_1;
avctx->pix_fmt = AV_PIX_FMT_YUV440P;
return 0;
case VPX_IMG_FMT_I444:
avctx->profile = AV_PROFILE_VP9_1;
avctx->pix_fmt = avctx->colorspace == AVCOL_SPC_RGB ?
AV_PIX_FMT_GBRP : AV_PIX_FMT_YUV444P;
return 0;
case VPX_IMG_FMT_I42016:
avctx->profile = AV_PROFILE_VP9_2;
if (img->bit_depth == 10) {
avctx->pix_fmt = AV_PIX_FMT_YUV420P10;
return 0;
} else if (img->bit_depth == 12) {
avctx->pix_fmt = AV_PIX_FMT_YUV420P12;
return 0;
} else {
return AVERROR_INVALIDDATA;
}
case VPX_IMG_FMT_I42216:
avctx->profile = AV_PROFILE_VP9_3;
if (img->bit_depth == 10) {
avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
return 0;
} else if (img->bit_depth == 12) {
avctx->pix_fmt = AV_PIX_FMT_YUV422P12;
return 0;
} else {
return AVERROR_INVALIDDATA;
}
case VPX_IMG_FMT_I44016:
avctx->profile = AV_PROFILE_VP9_3;
if (img->bit_depth == 10) {
avctx->pix_fmt = AV_PIX_FMT_YUV440P10;
return 0;
} else if (img->bit_depth == 12) {
avctx->pix_fmt = AV_PIX_FMT_YUV440P12;
return 0;
} else {
return AVERROR_INVALIDDATA;
}
case VPX_IMG_FMT_I44416:
avctx->profile = AV_PROFILE_VP9_3;
if (img->bit_depth == 10) {
avctx->pix_fmt = avctx->colorspace == AVCOL_SPC_RGB ?
AV_PIX_FMT_GBRP10 : AV_PIX_FMT_YUV444P10;
return 0;
} else if (img->bit_depth == 12) {
avctx->pix_fmt = avctx->colorspace == AVCOL_SPC_RGB ?
AV_PIX_FMT_GBRP12 : AV_PIX_FMT_YUV444P12;
return 0;
} else {
return AVERROR_INVALIDDATA;
}
#endif
default:
return AVERROR_INVALIDDATA;
}
}
static int decode_frame(AVCodecContext *avctx, vpx_codec_ctx_t *decoder,
const uint8_t *data, uint32_t data_sz)
{
if (vpx_codec_decode(decoder, data, data_sz, NULL, 0) != VPX_CODEC_OK) {
const char *error = vpx_codec_error(decoder);
const char *detail = vpx_codec_error_detail(decoder);
av_log(avctx, AV_LOG_ERROR, "Failed to decode frame: %s\n", error);
if (detail) {
av_log(avctx, AV_LOG_ERROR, " Additional information: %s\n",
detail);
}
return AVERROR_INVALIDDATA;
}
return 0;
}
static int vpx_decode(AVCodecContext *avctx, AVFrame *picture,
int *got_frame, AVPacket *avpkt)
{
VPxContext *ctx = avctx->priv_data;
const void *iter = NULL;
const void *iter_alpha = NULL;
struct vpx_image *img, *img_alpha;
int ret;
uint8_t *side_data = NULL;
size_t side_data_size;
ret = decode_frame(avctx, &ctx->decoder, avpkt->data, avpkt->size);
if (ret)
return ret;
side_data = av_packet_get_side_data(avpkt,
AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
&side_data_size);
if (side_data_size >= 8) {
const uint64_t additional_id = AV_RB64(side_data);
side_data += 8;
side_data_size -= 8;
if (additional_id == 1) { // 1 stands for alpha channel data.
if (!ctx->has_alpha_channel) {
ctx->has_alpha_channel = 1;
ret = vpx_init(avctx,
&ctx->decoder_alpha,
#if CONFIG_LIBVPX_VP8_DECODER && CONFIG_LIBVPX_VP9_DECODER
(avctx->codec_id == AV_CODEC_ID_VP8) ?
vpx_codec_vp8_dx() : vpx_codec_vp9_dx()
#elif CONFIG_LIBVPX_VP8_DECODER
vpx_codec_vp8_dx()
#else
vpx_codec_vp9_dx()
#endif
);
if (ret)
return ret;
}
ret = decode_frame(avctx, &ctx->decoder_alpha, side_data,
side_data_size);
if (ret)
return ret;
}
}
if ((img = vpx_codec_get_frame(&ctx->decoder, &iter)) &&
(!ctx->has_alpha_channel ||
(img_alpha = vpx_codec_get_frame(&ctx->decoder_alpha, &iter_alpha)))) {
uint8_t *planes[4];
int linesizes[4];
if (img->d_w > img->w || img->d_h > img->h) {
av_log(avctx, AV_LOG_ERROR, "Display dimensions %dx%d exceed storage %dx%d\n",
img->d_w, img->d_h, img->w, img->h);
return AVERROR_EXTERNAL;
}
if ((ret = set_pix_fmt(avctx, img, ctx->has_alpha_channel)) < 0) {
av_log(avctx, AV_LOG_ERROR, "Unsupported output colorspace (%d) / bit_depth (%d)\n",
img->fmt, img->bit_depth);
return ret;
}
if ((int) img->d_w != avctx->width || (int) img->d_h != avctx->height) {
av_log(avctx, AV_LOG_INFO, "dimension change! %dx%d -> %dx%d\n",
avctx->width, avctx->height, img->d_w, img->d_h);
ret = ff_set_dimensions(avctx, img->d_w, img->d_h);
if (ret < 0)
return ret;
}
if (ctx->has_alpha_channel &&
(img->d_w != img_alpha->d_w ||
img->d_h != img_alpha->d_h ||
img->bit_depth != img_alpha->bit_depth)) {
av_log(avctx, AV_LOG_ERROR,
"Video dimensions %dx%d@%dbpc differ from alpha dimensions %dx%d@%dbpc\n",
img->d_w, img->d_h, img->bit_depth,
img_alpha->d_w, img_alpha->d_h, img_alpha->bit_depth);
return AVERROR_INVALIDDATA;
}
planes[0] = img->planes[VPX_PLANE_Y];
planes[1] = img->planes[VPX_PLANE_U];
planes[2] = img->planes[VPX_PLANE_V];
planes[3] =
ctx->has_alpha_channel ? img_alpha->planes[VPX_PLANE_Y] : NULL;
linesizes[0] = img->stride[VPX_PLANE_Y];
linesizes[1] = img->stride[VPX_PLANE_U];
linesizes[2] = img->stride[VPX_PLANE_V];
linesizes[3] =
ctx->has_alpha_channel ? img_alpha->stride[VPX_PLANE_Y] : 0;
if (img->fb_priv && (!ctx->has_alpha_channel || img_alpha->fb_priv)) {
ret = ff_decode_frame_props(avctx, picture);
if (ret < 0)
return ret;
picture->buf[0] = av_buffer_ref(img->fb_priv);
if (!picture->buf[0])
return AVERROR(ENOMEM);
if (ctx->has_alpha_channel) {
picture->buf[1] = av_buffer_ref(img_alpha->fb_priv);
if (!picture->buf[1])
return AVERROR(ENOMEM);
}
for (int i = 0; i < 4; i++) {
picture->data[i] = planes[i];
picture->linesize[i] = linesizes[i];
}
} else {
if ((ret = ff_get_buffer(avctx, picture, 0)) < 0)
return ret;
av_image_copy2(picture->data, picture->linesize, planes,
linesizes, avctx->pix_fmt, img->d_w, img->d_h);
}
*got_frame = 1;
}
return avpkt->size;
}
static av_cold int vpx_free(AVCodecContext *avctx)
{
VPxContext *ctx = avctx->priv_data;
vpx_codec_destroy(&ctx->decoder);
if (ctx->has_alpha_channel)
vpx_codec_destroy(&ctx->decoder_alpha);
av_buffer_pool_uninit(&ctx->pool);
return 0;
}
#if CONFIG_LIBVPX_VP8_DECODER
static av_cold int vp8_init(AVCodecContext *avctx)
{
VPxContext *ctx = avctx->priv_data;
return vpx_init(avctx, &ctx->decoder, vpx_codec_vp8_dx());
}
const FFCodec ff_libvpx_vp8_decoder = {
.p.name = "libvpx",
CODEC_LONG_NAME("libvpx VP8"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_VP8,
.p.capabilities = AV_CODEC_CAP_OTHER_THREADS | AV_CODEC_CAP_DR1,
.p.wrapper_name = "libvpx",
.priv_data_size = sizeof(VPxContext),
.init = vp8_init,
.close = vpx_free,
FF_CODEC_DECODE_CB(vpx_decode),
.caps_internal = FF_CODEC_CAP_NOT_INIT_THREADSAFE |
FF_CODEC_CAP_AUTO_THREADS,
};
#endif /* CONFIG_LIBVPX_VP8_DECODER */
#if CONFIG_LIBVPX_VP9_DECODER
static av_cold int vp9_init(AVCodecContext *avctx)
{
VPxContext *ctx = avctx->priv_data;
return vpx_init(avctx, &ctx->decoder, vpx_codec_vp9_dx());
}
const FFCodec ff_libvpx_vp9_decoder = {
.p.name = "libvpx-vp9",
CODEC_LONG_NAME("libvpx VP9"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_VP9,
.p.capabilities = AV_CODEC_CAP_OTHER_THREADS,
.p.profiles = NULL_IF_CONFIG_SMALL(ff_vp9_profiles),
.p.wrapper_name = "libvpx",
.priv_data_size = sizeof(VPxContext),
.init = vp9_init,
.close = vpx_free,
FF_CODEC_DECODE_CB(vpx_decode),
.caps_internal = FF_CODEC_CAP_NOT_INIT_THREADSAFE |
FF_CODEC_CAP_AUTO_THREADS,
};
#endif /* CONFIG_LIBVPX_VP9_DECODER */