avtools/avconv_vda.c

   1 /*
   2  * This file is part of Libav.
   3  *
   4  * Libav is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * Libav is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with Libav; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 #include "libavcodec/avcodec.h"
  20 #include "libavcodec/vda.h"
  21 #include "libavutil/imgutils.h"
  22
  23 #include "avconv.h"
  24
  25 typedef struct VDAContext {
  26     AVFrame *tmp_frame;
  27 } VDAContext;
  28
  29 static int vda_retrieve_data(AVCodecContext *s, AVFrame *frame)
  30 {
  31     InputStream *ist = s->opaque;
  32     VDAContext  *vda = ist->hwaccel_ctx;
  33     CVPixelBufferRef pixbuf = (CVPixelBufferRef)frame->data[3];
  34     OSType pixel_format = CVPixelBufferGetPixelFormatType(pixbuf);
  35     CVReturn err;
  36     uint8_t *data[4] = { 0 };
  37     int linesize[4] = { 0 };
  38     int planes, ret, i;
  39
  40     av_frame_unref(vda->tmp_frame);
  41
  42     switch (pixel_format) {
  43     case kCVPixelFormatType_420YpCbCr8Planar: vda->tmp_frame->format = AV_PIX_FMT_YUV420P; break;
  44     case kCVPixelFormatType_422YpCbCr8:       vda->tmp_frame->format = AV_PIX_FMT_UYVY422; break;
  45     default:
  46         av_log(NULL, AV_LOG_ERROR,
  47                "Unsupported pixel format: %u\n", pixel_format);
  48         return AVERROR(ENOSYS);
  49     }
  50
  51     vda->tmp_frame->width  = frame->width;
  52     vda->tmp_frame->height = frame->height;
  53     ret = av_frame_get_buffer(vda->tmp_frame, 32);
  54     if (ret < 0)
  55         return ret;
  56
  57     err = CVPixelBufferLockBaseAddress(pixbuf, kCVPixelBufferLock_ReadOnly);
  58     if (err != kCVReturnSuccess) {
  59         av_log(NULL, AV_LOG_ERROR, "Error locking the pixel buffer.\n");
  60         return AVERROR_UNKNOWN;
  61     }
  62
  63     if (CVPixelBufferIsPlanar(pixbuf)) {
  64
  65         planes = CVPixelBufferGetPlaneCount(pixbuf);
  66         for (i = 0; i < planes; i++) {
  67             data[i]     = CVPixelBufferGetBaseAddressOfPlane(pixbuf, i);
  68             linesize[i] = CVPixelBufferGetBytesPerRowOfPlane(pixbuf, i);
  69         }
  70     } else {
  71         data[0] = CVPixelBufferGetBaseAddress(pixbuf);
  72         linesize[0] = CVPixelBufferGetBytesPerRow(pixbuf);
  73     }
  74
  75     av_image_copy(vda->tmp_frame->data, vda->tmp_frame->linesize,
  76                   data, linesize, vda->tmp_frame->format,
  77                   frame->width, frame->height);
  78
  79     CVPixelBufferUnlockBaseAddress(pixbuf, kCVPixelBufferLock_ReadOnly);
  80
  81     ret = av_frame_copy_props(vda->tmp_frame, frame);
  82     if (ret < 0)
  83         return ret;
  84
  85     av_frame_unref(frame);
  86     av_frame_move_ref(frame, vda->tmp_frame);
  87
  88     return 0;
  89 }
  90
  91 static void vda_uninit(AVCodecContext *s)
  92 {
  93     InputStream *ist = s->opaque;
  94     VDAContext  *vda = ist->hwaccel_ctx;
  95
  96     ist->hwaccel_uninit        = NULL;
  97     ist->hwaccel_retrieve_data = NULL;
  98
  99     av_frame_free(&vda->tmp_frame);
 100
 101     av_vda_default_free(s);
 102     av_freep(&ist->hwaccel_ctx);
 103 }
 104
 105 int vda_init(AVCodecContext *s)
 106 {
 107     InputStream *ist = s->opaque;
 108     int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
 109     VDAContext *vda;
 110     int ret;
 111
 112     vda = av_mallocz(sizeof(*vda));
 113     if (!vda)
 114         return AVERROR(ENOMEM);
 115
 116     ist->hwaccel_ctx           = vda;
 117     ist->hwaccel_uninit        = vda_uninit;
 118     ist->hwaccel_retrieve_data = vda_retrieve_data;
 119
 120     vda->tmp_frame = av_frame_alloc();
 121     if (!vda->tmp_frame) {
 122         ret = AVERROR(ENOMEM);
 123         goto fail;
 124     }
 125
 126     ret = av_vda_default_init(s);
 127     if (ret < 0) {
 128         av_log(NULL, loglevel, "Error creating VDA decoder.\n");
 129         goto fail;
 130     }
 131
 132     return 0;
 133 fail:
 134     vda_uninit(s);
 135     return ret;
 136 }