diff options
Diffstat (limited to 'media/libaom/src/examples/scalable_encoder.c')
| -rw-r--r-- | media/libaom/src/examples/scalable_encoder.c | 289 |
1 files changed, 289 insertions, 0 deletions
diff --git a/media/libaom/src/examples/scalable_encoder.c b/media/libaom/src/examples/scalable_encoder.c new file mode 100644 index 000000000..7af03e29f --- /dev/null +++ b/media/libaom/src/examples/scalable_encoder.c @@ -0,0 +1,289 @@ +/* + * Copyright (c) 2018, Alliance for Open Media. All rights reserved + * + * This source code is subject to the terms of the BSD 2 Clause License and + * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License + * was not distributed with this source code in the LICENSE file, you can + * obtain it at www.aomedia.org/license/software. If the Alliance for Open + * Media Patent License 1.0 was not distributed with this source code in the + * PATENTS file, you can obtain it at www.aomedia.org/license/patent. + */ + +// Scalable Encoder +// ============== +// +// This is an example of a scalable encoder loop. It takes two input files in +// YV12 format, passes it through the encoder, and writes the compressed +// frames to disk in OBU format. +// +// Getting The Default Configuration +// --------------------------------- +// Encoders have the notion of "usage profiles." For example, an encoder +// may want to publish default configurations for both a video +// conferencing application and a best quality offline encoder. These +// obviously have very different default settings. Consult the +// documentation for your codec to see if it provides any default +// configurations. All codecs provide a default configuration, number 0, +// which is valid for material in the vacinity of QCIF/QVGA. +// +// Updating The Configuration +// --------------------------------- +// Almost all applications will want to update the default configuration +// with settings specific to their usage. Here we set the width and height +// of the video file to that specified on the command line. We also scale +// the default bitrate based on the ratio between the default resolution +// and the resolution specified on the command line. +// +// Encoding A Frame +// ---------------- +// The frame is read as a continuous block (size = width * height * 3 / 2) +// from the input file. If a frame was read (the input file has not hit +// EOF) then the frame is passed to the encoder. Otherwise, a NULL +// is passed, indicating the End-Of-Stream condition to the encoder. The +// `frame_cnt` is reused as the presentation time stamp (PTS) and each +// frame is shown for one frame-time in duration. The flags parameter is +// unused in this example. + +// Forced Keyframes +// ---------------- +// Keyframes can be forced by setting the AOM_EFLAG_FORCE_KF bit of the +// flags passed to `aom_codec_control()`. In this example, we force a +// keyframe every <keyframe-interval> frames. Note, the output stream can +// contain additional keyframes beyond those that have been forced using the +// AOM_EFLAG_FORCE_KF flag because of automatic keyframe placement by the +// encoder. +// +// Processing The Encoded Data +// --------------------------- +// Each packet of type `AOM_CODEC_CX_FRAME_PKT` contains the encoded data +// for this frame. We write a IVF frame header, followed by the raw data. +// +// Cleanup +// ------- +// The `aom_codec_destroy` call frees any memory allocated by the codec. +// +// Error Handling +// -------------- +// This example does not special case any error return codes. If there was +// an error, a descriptive message is printed and the program exits. With +// few exeptions, aom_codec functions return an enumerated error status, +// with the value `0` indicating success. + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "aom/aom_encoder.h" +#include "aom/aomcx.h" +#include "av1/common/enums.h" +#include "common/tools_common.h" +#include "common/video_writer.h" + +static const char *exec_name; + +void usage_exit(void) { + fprintf(stderr, + "Usage: %s <codec> <width> <height> <infile0> <infile1> " + "<outfile> <frames to encode>\n" + "See comments in scalable_encoder.c for more information.\n", + exec_name); + exit(EXIT_FAILURE); +} + +static int encode_frame(aom_codec_ctx_t *codec, aom_image_t *img, + int frame_index, int flags, FILE *outfile) { + int got_pkts = 0; + aom_codec_iter_t iter = NULL; + const aom_codec_cx_pkt_t *pkt = NULL; + const aom_codec_err_t res = + aom_codec_encode(codec, img, frame_index, 1, flags); + if (res != AOM_CODEC_OK) die_codec(codec, "Failed to encode frame"); + + while ((pkt = aom_codec_get_cx_data(codec, &iter)) != NULL) { + got_pkts = 1; + + if (pkt->kind == AOM_CODEC_CX_FRAME_PKT) { + const int keyframe = (pkt->data.frame.flags & AOM_FRAME_IS_KEY) != 0; + if (fwrite(pkt->data.frame.buf, 1, pkt->data.frame.sz, outfile) != + pkt->data.frame.sz) { + die_codec(codec, "Failed to write compressed frame"); + } + printf(keyframe ? "K" : "."); + printf(" %6d\n", (int)pkt->data.frame.sz); + fflush(stdout); + } + } + + return got_pkts; +} + +int main(int argc, char **argv) { + FILE *infile0 = NULL; + FILE *infile1 = NULL; + aom_codec_ctx_t codec; + aom_codec_enc_cfg_t cfg; + int frame_count = 0; + aom_image_t raw0, raw1; + aom_codec_err_t res; + AvxVideoInfo info; + const AvxInterface *encoder = NULL; + const int fps = 30; + const int bitrate = 200; + int keyframe_interval = 0; + int max_frames = 0; + int frames_encoded = 0; + const char *codec_arg = NULL; + const char *width_arg = NULL; + const char *height_arg = NULL; + const char *infile0_arg = NULL; + const char *infile1_arg = NULL; + const char *outfile_arg = NULL; + // const char *keyframe_interval_arg = NULL; + FILE *outfile = NULL; + + exec_name = argv[0]; + + // Clear explicitly, as simply assigning "{ 0 }" generates + // "missing-field-initializers" warning in some compilers. + memset(&info, 0, sizeof(info)); + + if (argc != 8) die("Invalid number of arguments"); + + codec_arg = argv[1]; + width_arg = argv[2]; + height_arg = argv[3]; + infile0_arg = argv[4]; + infile1_arg = argv[5]; + outfile_arg = argv[6]; + max_frames = (int)strtol(argv[7], NULL, 0); + + encoder = get_aom_encoder_by_name(codec_arg); + if (!encoder) die("Unsupported codec."); + + info.codec_fourcc = encoder->fourcc; + info.frame_width = (int)strtol(width_arg, NULL, 0); + info.frame_height = (int)strtol(height_arg, NULL, 0); + info.time_base.numerator = 1; + info.time_base.denominator = fps; + + if (info.frame_width <= 0 || info.frame_height <= 0 || + (info.frame_width % 2) != 0 || (info.frame_height % 2) != 0) { + die("Invalid frame size: %dx%d", info.frame_width, info.frame_height); + } + + if (!aom_img_alloc(&raw0, AOM_IMG_FMT_I420, info.frame_width, + info.frame_height, 1)) { + die("Failed to allocate image for layer 0."); + } + if (!aom_img_alloc(&raw1, AOM_IMG_FMT_I420, info.frame_width, + info.frame_height, 1)) { + die("Failed to allocate image for layer 1."); + } + + // keyframe_interval = (int)strtol(keyframe_interval_arg, NULL, 0); + keyframe_interval = 100; + if (keyframe_interval < 0) die("Invalid keyframe interval value."); + + printf("Using %s\n", aom_codec_iface_name(encoder->codec_interface())); + + res = aom_codec_enc_config_default(encoder->codec_interface(), &cfg, 0); + if (res) die_codec(&codec, "Failed to get default codec config."); + + cfg.g_w = info.frame_width; + cfg.g_h = info.frame_height; + cfg.g_timebase.num = info.time_base.numerator; + cfg.g_timebase.den = info.time_base.denominator; + cfg.rc_target_bitrate = bitrate; + cfg.g_error_resilient = 0; + cfg.g_lag_in_frames = 0; + cfg.rc_end_usage = AOM_Q; + cfg.save_as_annexb = 0; + + outfile = fopen(outfile_arg, "wb"); + if (!outfile) die("Failed to open %s for writing.", outfile_arg); + + if (!(infile0 = fopen(infile0_arg, "rb"))) + die("Failed to open %s for reading.", infile0_arg); + if (!(infile1 = fopen(infile1_arg, "rb"))) + die("Failed to open %s for reading.", infile0_arg); + + if (aom_codec_enc_init(&codec, encoder->codec_interface(), &cfg, 0)) + die_codec(&codec, "Failed to initialize encoder"); + if (aom_codec_control(&codec, AOME_SET_CPUUSED, 8)) + die_codec(&codec, "Failed to set cpu to 8"); + + if (aom_codec_control(&codec, AV1E_SET_TILE_COLUMNS, 2)) + die_codec(&codec, "Failed to set tile columns to 2"); + if (aom_codec_control(&codec, AV1E_SET_NUM_TG, 3)) + die_codec(&codec, "Failed to set num of tile groups to 3"); + + if (aom_codec_control(&codec, AOME_SET_NUMBER_SPATIAL_LAYERS, 2)) + die_codec(&codec, "Failed to set number of spatial layers to 2"); + + // Encode frames. + while (aom_img_read(&raw0, infile0)) { + int flags = 0; + + // configure and encode base layer + + if (keyframe_interval > 0 && frames_encoded % keyframe_interval == 0) + flags |= AOM_EFLAG_FORCE_KF; + else + // use previous base layer (LAST) as sole reference + // save this frame as LAST to be used as reference by enhanmcent layer + // and next base layer + flags |= AOM_EFLAG_NO_REF_LAST2 | AOM_EFLAG_NO_REF_LAST3 | + AOM_EFLAG_NO_REF_GF | AOM_EFLAG_NO_REF_ARF | + AOM_EFLAG_NO_REF_BWD | AOM_EFLAG_NO_REF_ARF2 | + AOM_EFLAG_NO_UPD_GF | AOM_EFLAG_NO_UPD_ARF | + AOM_EFLAG_NO_UPD_ENTROPY; + cfg.g_w = info.frame_width; + cfg.g_h = info.frame_height; + if (aom_codec_enc_config_set(&codec, &cfg)) + die_codec(&codec, "Failed to set enc cfg for layer 0"); + if (aom_codec_control(&codec, AOME_SET_SPATIAL_LAYER_ID, 0)) + die_codec(&codec, "Failed to set layer id to 0"); + if (aom_codec_control(&codec, AOME_SET_CQ_LEVEL, 62)) + die_codec(&codec, "Failed to set cq level"); + encode_frame(&codec, &raw0, frame_count++, flags, outfile); + + // configure and encode enhancement layer + + // use LAST (base layer) as sole reference + flags = AOM_EFLAG_NO_REF_LAST2 | AOM_EFLAG_NO_REF_LAST3 | + AOM_EFLAG_NO_REF_GF | AOM_EFLAG_NO_REF_ARF | AOM_EFLAG_NO_REF_BWD | + AOM_EFLAG_NO_REF_ARF2 | AOM_EFLAG_NO_UPD_LAST | + AOM_EFLAG_NO_UPD_GF | AOM_EFLAG_NO_UPD_ARF | + AOM_EFLAG_NO_UPD_ENTROPY; + cfg.g_w = info.frame_width; + cfg.g_h = info.frame_height; + aom_img_read(&raw1, infile1); + if (aom_codec_enc_config_set(&codec, &cfg)) + die_codec(&codec, "Failed to set enc cfg for layer 1"); + if (aom_codec_control(&codec, AOME_SET_SPATIAL_LAYER_ID, 1)) + die_codec(&codec, "Failed to set layer id to 1"); + if (aom_codec_control(&codec, AOME_SET_CQ_LEVEL, 10)) + die_codec(&codec, "Failed to set cq level"); + encode_frame(&codec, &raw1, frame_count++, flags, outfile); + + frames_encoded++; + + if (max_frames > 0 && frames_encoded >= max_frames) break; + } + + // Flush encoder. + while (encode_frame(&codec, NULL, -1, 0, outfile)) continue; + + printf("\n"); + fclose(infile0); + fclose(infile1); + printf("Processed %d frames.\n", frame_count / 2); + + aom_img_free(&raw0); + aom_img_free(&raw1); + if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec."); + + fclose(outfile); + + return EXIT_SUCCESS; +} |