ffmpeg/libavcodec/libvpxdec.c

   1 /*
   2  * Copyright (c) 2010, Google, Inc.
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 /**
  22  * @file
  23  * VP8 decoder support via libvpx
  24  */
  25
  26 #define VPX_CODEC_DISABLE_COMPAT 1
  27 #include <vpx/vpx_decoder.h>
  28 #include <vpx/vp8dx.h>
  29
  30 #include "libavutil/common.h"
  31 #include "libavutil/imgutils.h"
  32 #include "avcodec.h"
  33 #include "internal.h"
  34 #include "libvpx.h"
  35
  36 typedef struct VP8DecoderContext {
  37     struct vpx_codec_ctx decoder;
  38 } VP8Context;
  39
  40 static av_cold int vpx_init(AVCodecContext *avctx,
  41                             const struct vpx_codec_iface *iface)
  42 {
  43     VP8Context *ctx = avctx->priv_data;
  44     struct vpx_codec_dec_cfg deccfg = {
  45         /* token partitions+1 would be a decent choice */
  46         .threads = FFMIN(avctx->thread_count, 16)
  47     };
  48
  49     av_log(avctx, AV_LOG_INFO, "%s\n", vpx_codec_version_str());
  50     av_log(avctx, AV_LOG_VERBOSE, "%s\n", vpx_codec_build_config());
  51
  52     if (vpx_codec_dec_init(&ctx->decoder, iface, &deccfg, 0) != VPX_CODEC_OK) {
  53         const char *error = vpx_codec_error(&ctx->decoder);
  54         av_log(avctx, AV_LOG_ERROR, "Failed to initialize decoder: %s\n",
  55                error);
  56         return AVERROR(EINVAL);
  57     }
  58
  59     return 0;
  60 }
  61
  62 // returns 0 on success, AVERROR_INVALIDDATA otherwise
  63 static int set_pix_fmt(AVCodecContext *avctx, struct vpx_image *img) {
  64     if (avctx->codec_id == AV_CODEC_ID_VP8 && img->fmt != VPX_IMG_FMT_I420)
  65         return AVERROR_INVALIDDATA;
  66     switch (img->fmt) {
  67         case VPX_IMG_FMT_I420:
  68             avctx->pix_fmt = AV_PIX_FMT_YUV420P;
  69             return 0;
  70 #if CONFIG_LIBVPX_VP9_DECODER
  71         case VPX_IMG_FMT_I422:
  72             avctx->pix_fmt = AV_PIX_FMT_YUV422P;
  73             return 0;
  74         case VPX_IMG_FMT_I444:
  75             avctx->pix_fmt = AV_PIX_FMT_YUV444P;
  76             return 0;
  77 #ifdef VPX_IMG_FMT_HIGHBITDEPTH
  78         case VPX_IMG_FMT_I42016:
  79             if (img->bit_depth == 10) {
  80                 avctx->pix_fmt = AV_PIX_FMT_YUV420P10LE;
  81                 return 0;
  82             } else if (img->bit_depth == 12) {
  83                 avctx->pix_fmt = AV_PIX_FMT_YUV420P12LE;
  84                 return 0;
  85             } else {
  86                 return AVERROR_INVALIDDATA;
  87             }
  88         case VPX_IMG_FMT_I42216:
  89             if (img->bit_depth == 10) {
  90                 avctx->pix_fmt = AV_PIX_FMT_YUV422P10LE;
  91                 return 0;
  92             } else if (img->bit_depth == 12) {
  93                 avctx->pix_fmt = AV_PIX_FMT_YUV422P12LE;
  94                 return 0;
  95             } else {
  96                 return AVERROR_INVALIDDATA;
  97             }
  98         case VPX_IMG_FMT_I44416:
  99             if (img->bit_depth == 10) {
 100                 avctx->pix_fmt = AV_PIX_FMT_YUV444P10LE;
 101                 return 0;
 102             } else if (img->bit_depth == 12) {
 103                 avctx->pix_fmt = AV_PIX_FMT_YUV444P12LE;
 104                 return 0;
 105             } else {
 106                 return AVERROR_INVALIDDATA;
 107             }
 108 #endif
 109 #endif
 110         default:
 111             return AVERROR_INVALIDDATA;
 112     }
 113 }
 114
 115 static int vp8_decode(AVCodecContext *avctx,
 116                       void *data, int *got_frame, AVPacket *avpkt)
 117 {
 118     VP8Context *ctx = avctx->priv_data;
 119     AVFrame *picture = data;
 120     const void *iter = NULL;
 121     struct vpx_image *img;
 122     int ret;
 123
 124     if (vpx_codec_decode(&ctx->decoder, avpkt->data, avpkt->size, NULL, 0) !=
 125         VPX_CODEC_OK) {
 126         const char *error  = vpx_codec_error(&ctx->decoder);
 127         const char *detail = vpx_codec_error_detail(&ctx->decoder);
 128
 129         av_log(avctx, AV_LOG_ERROR, "Failed to decode frame: %s\n", error);
 130         if (detail)
 131             av_log(avctx, AV_LOG_ERROR, "  Additional information: %s\n",
 132                    detail);
 133         return AVERROR_INVALIDDATA;
 134     }
 135
 136     if ((img = vpx_codec_get_frame(&ctx->decoder, &iter))) {
 137         if ((ret = set_pix_fmt(avctx, img)) < 0) {
 138 #ifdef VPX_IMG_FMT_HIGHBITDEPTH
 139             av_log(avctx, AV_LOG_ERROR, "Unsupported output colorspace (%d) / bit_depth (%d)\n",
 140                    img->fmt, img->bit_depth);
 141 #else
 142             av_log(avctx, AV_LOG_ERROR, "Unsupported output colorspace (%d) / bit_depth (%d)\n",
 143                    img->fmt, 8);
 144 #endif
 145             return ret;
 146         }
 147
 148         if ((int) img->d_w != avctx->width || (int) img->d_h != avctx->height) {
 149             av_log(avctx, AV_LOG_INFO, "dimension change! %dx%d -> %dx%d\n",
 150                    avctx->width, avctx->height, img->d_w, img->d_h);
 151             ret = ff_set_dimensions(avctx, img->d_w, img->d_h);
 152             if (ret < 0)
 153                 return ret;
 154         }
 155         if ((ret = ff_get_buffer(avctx, picture, 0)) < 0)
 156             return ret;
 157         av_image_copy(picture->data, picture->linesize, (const uint8_t **)img->planes,
 158                       img->stride, avctx->pix_fmt, img->d_w, img->d_h);
 159         *got_frame           = 1;
 160     }
 161     return avpkt->size;
 162 }
 163
 164 static av_cold int vp8_free(AVCodecContext *avctx)
 165 {
 166     VP8Context *ctx = avctx->priv_data;
 167     vpx_codec_destroy(&ctx->decoder);
 168     return 0;
 169 }
 170
 171 #if CONFIG_LIBVPX_VP8_DECODER
 172 static av_cold int vp8_init(AVCodecContext *avctx)
 173 {
 174     return vpx_init(avctx, &vpx_codec_vp8_dx_algo);
 175 }
 176
 177 AVCodec ff_libvpx_vp8_decoder = {
 178     .name           = "libvpx",
 179     .long_name      = NULL_IF_CONFIG_SMALL("libvpx VP8"),
 180     .type           = AVMEDIA_TYPE_VIDEO,
 181     .id             = AV_CODEC_ID_VP8,
 182     .priv_data_size = sizeof(VP8Context),
 183     .init           = vp8_init,
 184     .close          = vp8_free,
 185     .decode         = vp8_decode,
 186     .capabilities   = CODEC_CAP_AUTO_THREADS | CODEC_CAP_DR1,
 187 };
 188 #endif /* CONFIG_LIBVPX_VP8_DECODER */
 189
 190 #if CONFIG_LIBVPX_VP9_DECODER
 191 static av_cold int vp9_init(AVCodecContext *avctx)
 192 {
 193     return vpx_init(avctx, &vpx_codec_vp9_dx_algo);
 194 }
 195
 196 AVCodec ff_libvpx_vp9_decoder = {
 197     .name           = "libvpx-vp9",
 198     .long_name      = NULL_IF_CONFIG_SMALL("libvpx VP9"),
 199     .type           = AVMEDIA_TYPE_VIDEO,
 200     .id             = AV_CODEC_ID_VP9,
 201     .priv_data_size = sizeof(VP8Context),
 202     .init           = vp9_init,
 203     .close          = vp8_free,
 204     .decode         = vp8_decode,
 205     .capabilities   = CODEC_CAP_AUTO_THREADS | CODEC_CAP_DR1,
 206     .init_static_data = ff_vp9_init_static,
 207 };
 208 #endif /* CONFIG_LIBVPX_VP9_DECODER */