194 lines
6.7 KiB
C
194 lines
6.7 KiB
C
/*
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* Copyright (c) 2019 Paul B Mahol
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/intreadwrite.h"
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#include "avcodec.h"
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#include "internal.h"
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typedef struct IMM5Context {
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AVCodecContext *h264_avctx; // wrapper context for H264
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AVCodecContext *hevc_avctx; // wrapper context for HEVC
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} IMM5Context;
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static const struct IMM5_unit {
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uint8_t bits[14];
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uint8_t len;
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} IMM5_units[14] = {
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{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x0B, 0x0F, 0x88 }, 12 },
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{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x83, 0xE2 }, 12 },
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{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x81, 0xE8, 0x80 }, 13 },
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{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x0B, 0x04, 0xA2 }, 12 },
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{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x81, 0x28, 0x80 }, 13 },
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{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x80, 0x92, 0x20 }, 13 },
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{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x0B, 0x0F, 0xC8 }, 13 },
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{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05, 0x83, 0xF2 }, 13 },
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{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05, 0x81, 0xEC, 0x80 }, 14 },
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{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x0B, 0x04, 0xB2 }, 13 },
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{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05, 0x81, 0x2C, 0x80 }, 14 },
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{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05, 0x80, 0x93, 0x20 }, 14 },
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{ { 0x00, 0x00, 0x00, 0x01, 0x68, 0xDE, 0x3C, 0x80 }, 8 },
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{ { 0x00, 0x00, 0x00, 0x01, 0x68, 0xCE, 0x32, 0x28 }, 8 },
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};
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static av_cold int imm5_init(AVCodecContext *avctx)
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{
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IMM5Context *ctx = avctx->priv_data;
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const AVCodec *codec;
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int ret;
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codec = avcodec_find_decoder(AV_CODEC_ID_H264);
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if (!codec)
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return AVERROR_BUG;
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ctx->h264_avctx = avcodec_alloc_context3(codec);
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if (!ctx->h264_avctx)
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return AVERROR(ENOMEM);
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ctx->h264_avctx->thread_count = 1;
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ctx->h264_avctx->flags = avctx->flags;
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ctx->h264_avctx->flags2 = avctx->flags2;
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ret = ff_codec_open2_recursive(ctx->h264_avctx, codec, NULL);
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if (ret < 0)
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return ret;
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codec = avcodec_find_decoder(AV_CODEC_ID_HEVC);
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if (!codec)
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return AVERROR_BUG;
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ctx->hevc_avctx = avcodec_alloc_context3(codec);
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if (!ctx->hevc_avctx)
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return AVERROR(ENOMEM);
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ctx->hevc_avctx->thread_count = 1;
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ctx->hevc_avctx->flags = avctx->flags;
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ctx->hevc_avctx->flags2 = avctx->flags2;
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ret = ff_codec_open2_recursive(ctx->hevc_avctx, codec, NULL);
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if (ret < 0)
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return ret;
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return 0;
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}
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static int imm5_decode_frame(AVCodecContext *avctx, void *data,
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int *got_frame, AVPacket *avpkt)
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{
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IMM5Context *ctx = avctx->priv_data;
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AVFrame *frame = data;
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AVCodecContext *codec_avctx = ctx->h264_avctx;
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int ret;
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if (avpkt->size > 24 && avpkt->data[8] <= 1 && AV_RL32(avpkt->data + 4) + 24ULL <= avpkt->size) {
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int codec_type = avpkt->data[1];
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int index = avpkt->data[10];
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int new_size = AV_RL32(avpkt->data + 4);
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int offset, off;
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if (codec_type == 0xA) {
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codec_avctx = ctx->hevc_avctx;
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} else if (index == 17) {
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index = 4;
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} else if (index == 18) {
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index = 5;
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}
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if (index >= 1 && index <= 12) {
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ret = av_packet_make_writable(avpkt);
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if (ret < 0)
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return ret;
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index -= 1;
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off = offset = IMM5_units[index].len;
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if (codec_type == 2) {
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offset += IMM5_units[12].len;
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} else {
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offset += IMM5_units[13].len;
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}
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avpkt->data += 24 - offset;
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avpkt->size = new_size + offset;
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memcpy(avpkt->data, IMM5_units[index].bits, IMM5_units[index].len);
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if (codec_type == 2) {
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memcpy(avpkt->data + off, IMM5_units[12].bits, IMM5_units[12].len);
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} else {
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memcpy(avpkt->data + off, IMM5_units[13].bits, IMM5_units[13].len);
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}
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} else {
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avpkt->data += 24;
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avpkt->size -= 24;
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}
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}
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ret = avcodec_send_packet(codec_avctx, avpkt);
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if (ret < 0) {
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av_log(avctx, AV_LOG_ERROR, "Error submitting a packet for decoding\n");
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return ret;
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}
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ret = avcodec_receive_frame(codec_avctx, frame);
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if (ret < 0)
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return ret;
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avctx->pix_fmt = codec_avctx->pix_fmt;
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avctx->coded_width = codec_avctx->coded_width;
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avctx->coded_height = codec_avctx->coded_height;
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avctx->width = codec_avctx->width;
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avctx->height = codec_avctx->height;
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avctx->bit_rate = codec_avctx->bit_rate;
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avctx->colorspace = codec_avctx->colorspace;
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avctx->color_range = codec_avctx->color_range;
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avctx->color_trc = codec_avctx->color_trc;
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avctx->color_primaries = codec_avctx->color_primaries;
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avctx->chroma_sample_location = codec_avctx->chroma_sample_location;
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*got_frame = 1;
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return avpkt->size;
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}
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static void imm5_flush(AVCodecContext *avctx)
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{
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IMM5Context *ctx = avctx->priv_data;
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avcodec_flush_buffers(ctx->h264_avctx);
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avcodec_flush_buffers(ctx->hevc_avctx);
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}
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static av_cold int imm5_close(AVCodecContext *avctx)
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{
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IMM5Context *ctx = avctx->priv_data;
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avcodec_free_context(&ctx->h264_avctx);
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avcodec_free_context(&ctx->hevc_avctx);
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return 0;
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}
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AVCodec ff_imm5_decoder = {
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.name = "imm5",
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.long_name = NULL_IF_CONFIG_SMALL("Infinity IMM5"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_IMM5,
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.init = imm5_init,
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.decode = imm5_decode_frame,
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.close = imm5_close,
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.flush = imm5_flush,
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.priv_data_size = sizeof(IMM5Context),
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
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FF_CODEC_CAP_INIT_CLEANUP,
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};
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