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FFmpeg/libavcodec/libvpxdec.c
James Zern 2afddfe9bf libvpxdec,cosmetics: rename common fns vp8 -> vpx 
+ the context struct

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Zern <jzern@google.com>
2016-07-21 20:50:26 -07:00

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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
*/
#define VPX_CODEC_DISABLE_COMPAT 1
#include <vpx/vpx_decoder.h>
#include <vpx/vp8dx.h>
#include "libavutil/common.h"
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "internal.h"
#include "libvpx.h"
#include "profiles.h"
typedef struct VPxDecoderContext {
struct vpx_codec_ctx decoder;
struct vpx_codec_ctx decoder_alpha;
int has_alpha_channel;
} VPxContext;
static av_cold int vpx_init(AVCodecContext *avctx,
const struct vpx_codec_iface *iface,
int is_alpha_decoder)
{
VPxContext *ctx = avctx->priv_data;
struct vpx_codec_dec_cfg deccfg = {
/* token partitions+1 would be a decent choice */
.threads = FFMIN(avctx->thread_count, 16)
};
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(
is_alpha_decoder ? &ctx->decoder_alpha : &ctx->decoder,
iface, &deccfg, 0) != VPX_CODEC_OK) {
const char *error = vpx_codec_error(&ctx->decoder);
av_log(avctx, AV_LOG_ERROR, "Failed to initialize decoder: %s\n",
error);
return AVERROR(EINVAL);
}
return 0;
}
// returns 0 on success, AVERROR_INVALIDDATA otherwise
static int set_pix_fmt(AVCodecContext *avctx, struct vpx_image *img,
int has_alpha_channel)
{
#if VPX_IMAGE_ABI_VERSION >= 3
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];
#endif
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 = FF_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 = FF_PROFILE_VP9_1;
avctx->pix_fmt = AV_PIX_FMT_YUV422P;
return 0;
#if VPX_IMAGE_ABI_VERSION >= 3
case VPX_IMG_FMT_I440:
avctx->profile = FF_PROFILE_VP9_1;
avctx->pix_fmt = AV_PIX_FMT_YUV440P;
return 0;
#endif
case VPX_IMG_FMT_I444:
avctx->profile = FF_PROFILE_VP9_1;
#if VPX_IMAGE_ABI_VERSION >= 3
avctx->pix_fmt = avctx->colorspace == AVCOL_SPC_RGB ?
AV_PIX_FMT_GBRP : AV_PIX_FMT_YUV444P;
#else
avctx->pix_fmt = AV_PIX_FMT_YUV444P;
#endif
return 0;
#ifdef VPX_IMG_FMT_HIGHBITDEPTH
case VPX_IMG_FMT_I42016:
avctx->profile = FF_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 = FF_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;
}
#if VPX_IMAGE_ABI_VERSION >= 3
case VPX_IMG_FMT_I44016:
avctx->profile = FF_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;
}
#endif
case VPX_IMG_FMT_I44416:
avctx->profile = FF_PROFILE_VP9_3;
if (img->bit_depth == 10) {
#if VPX_IMAGE_ABI_VERSION >= 3
avctx->pix_fmt = avctx->colorspace == AVCOL_SPC_RGB ?
AV_PIX_FMT_GBRP10 : AV_PIX_FMT_YUV444P10;
#else
avctx->pix_fmt = AV_PIX_FMT_YUV444P10;
#endif
return 0;
} else if (img->bit_depth == 12) {
#if VPX_IMAGE_ABI_VERSION >= 3
avctx->pix_fmt = avctx->colorspace == AVCOL_SPC_RGB ?
AV_PIX_FMT_GBRP12 : AV_PIX_FMT_YUV444P12;
#else
avctx->pix_fmt = AV_PIX_FMT_YUV444P12;
#endif
return 0;
} else {
return AVERROR_INVALIDDATA;
}
#endif
#endif
default:
return AVERROR_INVALIDDATA;
}
}
static int decode_frame(AVCodecContext *avctx, vpx_codec_ctx_t *decoder,
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,
void *data, int *got_frame, AVPacket *avpkt)
{
VPxContext *ctx = avctx->priv_data;
AVFrame *picture = data;
const void *iter = NULL;
const void *iter_alpha = NULL;
struct vpx_image *img, *img_alpha;
int ret;
uint8_t *side_data = NULL;
int side_data_size = 0;
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 > 1) {
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,
#if CONFIG_LIBVPX_VP8_DECODER && CONFIG_LIBVPX_VP9_DECODER
(avctx->codec_id == AV_CODEC_ID_VP8) ?
&vpx_codec_vp8_dx_algo : &vpx_codec_vp9_dx_algo,
#elif CONFIG_LIBVPX_VP8_DECODER
&vpx_codec_vp8_dx_algo,
#else
&vpx_codec_vp9_dx_algo,
#endif
1);
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 ((ret = set_pix_fmt(avctx, img, ctx->has_alpha_channel)) < 0) {
#ifdef VPX_IMG_FMT_HIGHBITDEPTH
av_log(avctx, AV_LOG_ERROR, "Unsupported output colorspace (%d) / bit_depth (%d)\n",
img->fmt, img->bit_depth);
#else
av_log(avctx, AV_LOG_ERROR, "Unsupported output colorspace (%d) / bit_depth (%d)\n",
img->fmt, 8);
#endif
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 ((ret = ff_get_buffer(avctx, picture, 0)) < 0)
return ret;
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;
av_image_copy(picture->data, picture->linesize, (const uint8_t**)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);
return 0;
}
#if CONFIG_LIBVPX_VP8_DECODER
static av_cold int vp8_init(AVCodecContext *avctx)
{
return vpx_init(avctx, &vpx_codec_vp8_dx_algo, 0);
}
AVCodec ff_libvpx_vp8_decoder = {
.name = "libvpx",
.long_name = NULL_IF_CONFIG_SMALL("libvpx VP8"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_VP8,
.priv_data_size = sizeof(VPxContext),
.init = vp8_init,
.close = vpx_free,
.decode = vpx_decode,
.capabilities = AV_CODEC_CAP_AUTO_THREADS | AV_CODEC_CAP_DR1,
};
#endif /* CONFIG_LIBVPX_VP8_DECODER */
#if CONFIG_LIBVPX_VP9_DECODER
static av_cold int vp9_init(AVCodecContext *avctx)
{
return vpx_init(avctx, &vpx_codec_vp9_dx_algo, 0);
}
AVCodec ff_libvpx_vp9_decoder = {
.name = "libvpx-vp9",
.long_name = NULL_IF_CONFIG_SMALL("libvpx VP9"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_VP9,
.priv_data_size = sizeof(VPxContext),
.init = vp9_init,
.close = vpx_free,
.decode = vpx_decode,
.capabilities = AV_CODEC_CAP_AUTO_THREADS | AV_CODEC_CAP_DR1,
.init_static_data = ff_vp9_init_static,
.profiles = NULL_IF_CONFIG_SMALL(ff_vp9_profiles),
};
#endif /* CONFIG_LIBVPX_VP9_DECODER */
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