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Diffstat (limited to 'chromium/third_party/libvpx/source/libvpx/examples/postproc.c')
-rw-r--r-- | chromium/third_party/libvpx/source/libvpx/examples/postproc.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/chromium/third_party/libvpx/source/libvpx/examples/postproc.c b/chromium/third_party/libvpx/source/libvpx/examples/postproc.c new file mode 100644 index 00000000000..be08e920beb --- /dev/null +++ b/chromium/third_party/libvpx/source/libvpx/examples/postproc.c @@ -0,0 +1,140 @@ +/* + * Copyright (c) 2010 The WebM project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +// Postprocessing Decoder +// ====================== +// +// This example adds postprocessing to the simple decoder loop. +// +// Initializing Postprocessing +// --------------------------- +// You must inform the codec that you might request postprocessing at +// initialization time. This is done by passing the VPX_CODEC_USE_POSTPROC +// flag to `vpx_codec_dec_init`. If the codec does not support +// postprocessing, this call will return VPX_CODEC_INCAPABLE. For +// demonstration purposes, we also fall back to default initialization if +// the codec does not provide support. +// +// Using Adaptive Postprocessing +// ----------------------------- +// VP6 provides "adaptive postprocessing." It will automatically select the +// best postprocessing filter on a frame by frame basis based on the amount +// of time remaining before the user's specified deadline expires. The +// special value 0 indicates that the codec should take as long as +// necessary to provide the best quality frame. This example gives the +// codec 15ms (15000us) to return a frame. Remember that this is a soft +// deadline, and the codec may exceed it doing its regular processing. In +// these cases, no additional postprocessing will be done. +// +// Codec Specific Postprocessing Controls +// -------------------------------------- +// Some codecs provide fine grained controls over their built-in +// postprocessors. VP8 is one example. The following sample code toggles +// postprocessing on and off every 15 frames. + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#define VPX_CODEC_DISABLE_COMPAT 1 + +#include "vpx/vp8dx.h" +#include "vpx/vpx_decoder.h" + +#include "./tools_common.h" +#include "./video_reader.h" +#include "./vpx_config.h" + +static const char *exec_name; + +void usage_exit() { + fprintf(stderr, "Usage: %s <infile> <outfile>\n", exec_name); + exit(EXIT_FAILURE); +} + +int main(int argc, char **argv) { + int frame_cnt = 0; + FILE *outfile = NULL; + vpx_codec_ctx_t codec; + vpx_codec_err_t res; + VpxVideoReader *reader = NULL; + const VpxInterface *decoder = NULL; + const VpxVideoInfo *info = NULL; + + exec_name = argv[0]; + + if (argc != 3) + die("Invalid number of arguments."); + + reader = vpx_video_reader_open(argv[1]); + if (!reader) + die("Failed to open %s for reading.", argv[1]); + + if (!(outfile = fopen(argv[2], "wb"))) + die("Failed to open %s for writing", argv[2]); + + info = vpx_video_reader_get_info(reader); + + decoder = get_vpx_decoder_by_fourcc(info->codec_fourcc); + if (!decoder) + die("Unknown input codec."); + + printf("Using %s\n", vpx_codec_iface_name(decoder->interface())); + + res = vpx_codec_dec_init(&codec, decoder->interface(), NULL, + VPX_CODEC_USE_POSTPROC); + if (res == VPX_CODEC_INCAPABLE) + die_codec(&codec, "Postproc not supported by this decoder."); + + if (res) + die_codec(&codec, "Failed to initialize decoder."); + + while (vpx_video_reader_read_frame(reader)) { + vpx_codec_iter_t iter = NULL; + vpx_image_t *img = NULL; + size_t frame_size = 0; + const unsigned char *frame = vpx_video_reader_get_frame(reader, + &frame_size); + + ++frame_cnt; + + if (frame_cnt % 30 == 1) { + vp8_postproc_cfg_t pp = {0, 0, 0}; + + if (vpx_codec_control(&codec, VP8_SET_POSTPROC, &pp)) + die_codec(&codec, "Failed to turn off postproc."); + } else if (frame_cnt % 30 == 16) { + vp8_postproc_cfg_t pp = {VP8_DEBLOCK | VP8_DEMACROBLOCK | VP8_MFQE, + 4, 0}; + if (vpx_codec_control(&codec, VP8_SET_POSTPROC, &pp)) + die_codec(&codec, "Failed to turn on postproc."); + }; + + // Decode the frame with 15ms deadline + if (vpx_codec_decode(&codec, frame, (unsigned int)frame_size, NULL, 15000)) + die_codec(&codec, "Failed to decode frame"); + + while ((img = vpx_codec_get_frame(&codec, &iter)) != NULL) { + vpx_img_write(img, outfile); + } + } + + printf("Processed %d frames.\n", frame_cnt); + if (vpx_codec_destroy(&codec)) + die_codec(&codec, "Failed to destroy codec"); + + printf("Play: ffplay -f rawvideo -pix_fmt yuv420p -s %dx%d %s\n", + info->frame_width, info->frame_height, argv[2]); + + vpx_video_reader_close(reader); + + fclose(outfile); + return EXIT_SUCCESS; +} |