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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 decoder support via libvpx
*/
#define VPX_CODEC_DISABLE_COMPAT 1 |
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#include <vpx/vpx_decoder.h>
#include <vpx/vp8dx.h> |
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|
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#include "libavutil/common.h" |
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#include "libavutil/imgutils.h" |
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#include "avcodec.h" |
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#include "internal.h" |
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#include "libvpx.h" |
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typedef struct VP8DecoderContext {
struct vpx_codec_ctx decoder;
} VP8Context;
|
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static av_cold int vpx_init(AVCodecContext *avctx,
const struct vpx_codec_iface *iface) |
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{
VP8Context *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(&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;
}
|
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// returns 0 on success, AVERROR_INVALIDDATA otherwise
static int set_pix_fmt(AVCodecContext *avctx, struct vpx_image *img) {
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:
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
return 0; |
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#if CONFIG_LIBVPX_VP9_DECODER |
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case VPX_IMG_FMT_I422:
avctx->pix_fmt = AV_PIX_FMT_YUV422P;
return 0;
case VPX_IMG_FMT_I444:
avctx->pix_fmt = AV_PIX_FMT_YUV444P;
return 0;
#ifdef VPX_IMG_FMT_HIGHBITDEPTH
case VPX_IMG_FMT_I42016:
if (img->bit_depth == 10) {
avctx->pix_fmt = AV_PIX_FMT_YUV420P10LE;
return 0;
} else if (img->bit_depth == 12) {
avctx->pix_fmt = AV_PIX_FMT_YUV420P12LE;
return 0;
} else {
return AVERROR_INVALIDDATA;
}
case VPX_IMG_FMT_I42216:
if (img->bit_depth == 10) {
avctx->pix_fmt = AV_PIX_FMT_YUV422P10LE;
return 0;
} else if (img->bit_depth == 12) {
avctx->pix_fmt = AV_PIX_FMT_YUV422P12LE;
return 0;
} else {
return AVERROR_INVALIDDATA;
}
case VPX_IMG_FMT_I44416:
if (img->bit_depth == 10) {
avctx->pix_fmt = AV_PIX_FMT_YUV444P10LE;
return 0;
} else if (img->bit_depth == 12) {
avctx->pix_fmt = AV_PIX_FMT_YUV444P12LE;
return 0;
} else {
return AVERROR_INVALIDDATA;
}
#endif |
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#endif |
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default:
return AVERROR_INVALIDDATA;
}
}
|
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static int vp8_decode(AVCodecContext *avctx, |
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void *data, int *got_frame, AVPacket *avpkt) |
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{
VP8Context *ctx = avctx->priv_data;
AVFrame *picture = data;
const void *iter = NULL;
struct vpx_image *img; |
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int ret; |
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if (vpx_codec_decode(&ctx->decoder, avpkt->data, avpkt->size, NULL, 0) !=
VPX_CODEC_OK) {
const char *error = vpx_codec_error(&ctx->decoder);
const char *detail = vpx_codec_error_detail(&ctx->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;
}
if ((img = vpx_codec_get_frame(&ctx->decoder, &iter))) { |
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if ((ret = set_pix_fmt(avctx, img)) < 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; |
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}
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); |
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ret = ff_set_dimensions(avctx, img->d_w, img->d_h);
if (ret < 0)
return ret; |
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} |
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if ((ret = ff_get_buffer(avctx, picture, 0)) < 0)
return ret; |
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av_image_copy(picture->data, picture->linesize, (const uint8_t **)img->planes, |
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img->stride, avctx->pix_fmt, img->d_w, img->d_h); |
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*got_frame = 1; |
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}
return avpkt->size;
}
static av_cold int vp8_free(AVCodecContext *avctx)
{
VP8Context *ctx = avctx->priv_data;
vpx_codec_destroy(&ctx->decoder);
return 0;
}
|
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#if CONFIG_LIBVPX_VP8_DECODER
static av_cold int vp8_init(AVCodecContext *avctx)
{
return vpx_init(avctx, &vpx_codec_vp8_dx_algo);
}
AVCodec ff_libvpx_vp8_decoder = { |
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.name = "libvpx", |
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.long_name = NULL_IF_CONFIG_SMALL("libvpx VP8"), |
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.type = AVMEDIA_TYPE_VIDEO, |
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.id = AV_CODEC_ID_VP8, |
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.priv_data_size = sizeof(VP8Context),
.init = vp8_init,
.close = vp8_free,
.decode = vp8_decode, |
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.capabilities = CODEC_CAP_AUTO_THREADS | CODEC_CAP_DR1, |
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}; |
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#endif /* CONFIG_LIBVPX_VP8_DECODER */ |
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|
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#if CONFIG_LIBVPX_VP9_DECODER |
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static av_cold int vp9_init(AVCodecContext *avctx)
{
return vpx_init(avctx, &vpx_codec_vp9_dx_algo);
}
AVCodec ff_libvpx_vp9_decoder = {
.name = "libvpx-vp9", |
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.long_name = NULL_IF_CONFIG_SMALL("libvpx VP9"), |
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.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_VP9,
.priv_data_size = sizeof(VP8Context),
.init = vp9_init,
.close = vp8_free,
.decode = vp8_decode, |
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.capabilities = CODEC_CAP_AUTO_THREADS | CODEC_CAP_DR1, |
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.init_static_data = ff_vp9_init_static, |
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}; |
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#endif /* CONFIG_LIBVPX_VP9_DECODER */ |