mirror of
https://github.com/mpv-player/mpv
synced 2024-12-23 07:12:39 +00:00
f6f8dc7782
Commit 5e4e248
added a mp_image_params field to mp_image, and moved many
parameters to that struct. display_w/h was left redundant with
mp_image_params.d_w/d_h. These fields were supposed to be always in
sync, but it seems some code forgot to do this correctly, such as
vf_fix_img_params() or mp_image_copy_attributes(). This led to the
problem in github issue #756, because display_w/_h could become
incorrect.
It turns out that most code didn't use the old fields anyway. Just
remove them. Note that mp_image_params.d_w/d_h are supposed to be always
valid, so the additional checks for 0 shouldn't be needed. Remove these
checks as well.
Fixes #756.
322 lines
9.0 KiB
C
322 lines
9.0 KiB
C
/*
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* This file is part of mplayer.
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*
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* mplayer is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* mplayer 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with mplayer. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <setjmp.h>
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#include <libavcodec/avcodec.h>
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#include <libavutil/mem.h>
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#include "compat/libav.h"
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#include "config.h"
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#if HAVE_JPEG
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#include <jpeglib.h>
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#endif
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#include "osdep/io.h"
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#include "image_writer.h"
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#include "talloc.h"
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#include "video/img_format.h"
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#include "video/mp_image.h"
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#include "video/fmt-conversion.h"
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#include "video/sws_utils.h"
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#include "options/m_option.h"
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const struct image_writer_opts image_writer_opts_defaults = {
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.format = "jpg",
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.png_compression = 7,
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.png_filter = 5,
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.jpeg_quality = 90,
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.jpeg_optimize = 100,
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.jpeg_smooth = 0,
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.jpeg_dpi = 72,
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.jpeg_progressive = 0,
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.jpeg_baseline = 1,
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};
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#define OPT_BASE_STRUCT struct image_writer_opts
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const struct m_sub_options image_writer_conf = {
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.opts = (m_option_t[]) {
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OPT_INTRANGE("jpeg-quality", jpeg_quality, 0, 0, 100),
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OPT_INTRANGE("jpeg-optimize", jpeg_optimize, 0, 0, 100),
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OPT_INTRANGE("jpeg-smooth", jpeg_smooth, 0, 0, 100),
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OPT_INTRANGE("jpeg-dpi", jpeg_dpi, M_OPT_MIN, 1, 99999),
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OPT_FLAG("jpeg-progressive", jpeg_progressive, 0),
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OPT_FLAG("jpeg-baseline", jpeg_baseline, 0),
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OPT_INTRANGE("png-compression", png_compression, 0, 0, 9),
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OPT_INTRANGE("png-filter", png_filter, 0, 0, 5),
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OPT_STRING("format", format, 0),
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{0},
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},
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.size = sizeof(struct image_writer_opts),
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.defaults = &image_writer_opts_defaults,
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};
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struct image_writer_ctx {
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struct mp_log *log;
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const struct image_writer_opts *opts;
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const struct img_writer *writer;
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};
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struct img_writer {
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const char *file_ext;
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int (*write)(struct image_writer_ctx *ctx, mp_image_t *image, FILE *fp);
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int *pixfmts;
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int lavc_codec;
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};
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static int write_lavc(struct image_writer_ctx *ctx, mp_image_t *image, FILE *fp)
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{
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int success = 0;
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AVFrame *pic = NULL;
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AVPacket pkt = {0};
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int got_output = 0;
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av_init_packet(&pkt);
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struct AVCodec *codec = avcodec_find_encoder(ctx->writer->lavc_codec);
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AVCodecContext *avctx = NULL;
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if (!codec)
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goto print_open_fail;
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avctx = avcodec_alloc_context3(codec);
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if (!avctx)
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goto print_open_fail;
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avctx->time_base = AV_TIME_BASE_Q;
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avctx->width = image->w;
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avctx->height = image->h;
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avctx->pix_fmt = imgfmt2pixfmt(image->imgfmt);
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if (avctx->pix_fmt == AV_PIX_FMT_NONE) {
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MP_ERR(ctx, "Image format %s not supported by lavc.\n",
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mp_imgfmt_to_name(image->imgfmt));
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goto error_exit;
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}
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if (ctx->writer->lavc_codec == AV_CODEC_ID_PNG) {
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avctx->compression_level = ctx->opts->png_compression;
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avctx->prediction_method = ctx->opts->png_filter;
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}
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if (avcodec_open2(avctx, codec, NULL) < 0) {
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print_open_fail:
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MP_ERR(ctx, "Could not open libavcodec encoder for saving images\n");
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goto error_exit;
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}
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pic = av_frame_alloc();
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if (!pic)
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goto error_exit;
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for (int n = 0; n < 4; n++) {
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pic->data[n] = image->planes[n];
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pic->linesize[n] = image->stride[n];
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}
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int ret = avcodec_encode_video2(avctx, &pkt, pic, &got_output);
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if (ret < 0)
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goto error_exit;
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fwrite(pkt.data, pkt.size, 1, fp);
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success = !!got_output;
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error_exit:
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if (avctx)
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avcodec_close(avctx);
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av_free(avctx);
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av_frame_free(&pic);
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av_free_packet(&pkt);
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return success;
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}
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#if HAVE_JPEG
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static void write_jpeg_error_exit(j_common_ptr cinfo)
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{
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// NOTE: do not write error message, too much effort to connect the libjpeg
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// log callbacks with mplayer's log function mp_msp()
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// Return control to the setjmp point
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longjmp(*(jmp_buf*)cinfo->client_data, 1);
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}
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static int write_jpeg(struct image_writer_ctx *ctx, mp_image_t *image, FILE *fp)
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{
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struct jpeg_compress_struct cinfo;
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struct jpeg_error_mgr jerr;
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cinfo.err = jpeg_std_error(&jerr);
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jerr.error_exit = write_jpeg_error_exit;
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jmp_buf error_return_jmpbuf;
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cinfo.client_data = &error_return_jmpbuf;
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if (setjmp(cinfo.client_data)) {
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jpeg_destroy_compress(&cinfo);
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return 0;
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}
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jpeg_create_compress(&cinfo);
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jpeg_stdio_dest(&cinfo, fp);
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cinfo.image_width = image->w;
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cinfo.image_height = image->h;
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cinfo.input_components = 3;
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cinfo.in_color_space = JCS_RGB;
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cinfo.write_JFIF_header = TRUE;
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cinfo.JFIF_major_version = 1;
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cinfo.JFIF_minor_version = 2;
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cinfo.density_unit = 1; /* 0=unknown, 1=dpi, 2=dpcm */
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cinfo.X_density = ctx->opts->jpeg_dpi;
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cinfo.Y_density = ctx->opts->jpeg_dpi;
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cinfo.write_Adobe_marker = TRUE;
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jpeg_set_defaults(&cinfo);
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jpeg_set_quality(&cinfo, ctx->opts->jpeg_quality, ctx->opts->jpeg_baseline);
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cinfo.optimize_coding = ctx->opts->jpeg_optimize;
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cinfo.smoothing_factor = ctx->opts->jpeg_smooth;
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if (ctx->opts->jpeg_progressive)
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jpeg_simple_progression(&cinfo);
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jpeg_start_compress(&cinfo, TRUE);
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while (cinfo.next_scanline < cinfo.image_height) {
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JSAMPROW row_pointer[1];
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row_pointer[0] = image->planes[0] +
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cinfo.next_scanline * image->stride[0];
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jpeg_write_scanlines(&cinfo, row_pointer,1);
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}
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jpeg_finish_compress(&cinfo);
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jpeg_destroy_compress(&cinfo);
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return 1;
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}
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#endif
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static const struct img_writer img_writers[] = {
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{ "png", write_lavc, .lavc_codec = AV_CODEC_ID_PNG },
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{ "ppm", write_lavc, .lavc_codec = AV_CODEC_ID_PPM },
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{ "pgm", write_lavc,
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.lavc_codec = AV_CODEC_ID_PGM,
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.pixfmts = (int[]) { IMGFMT_Y8, 0 },
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},
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{ "pgmyuv", write_lavc,
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.lavc_codec = AV_CODEC_ID_PGMYUV,
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.pixfmts = (int[]) { IMGFMT_420P, 0 },
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},
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{ "tga", write_lavc,
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.lavc_codec = AV_CODEC_ID_TARGA,
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.pixfmts = (int[]) { IMGFMT_BGR24, IMGFMT_BGRA, IMGFMT_BGR15_LE,
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IMGFMT_Y8, 0},
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},
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#if HAVE_JPEG
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{ "jpg", write_jpeg },
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{ "jpeg", write_jpeg },
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#endif
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};
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static const struct img_writer *get_writer(const struct image_writer_opts *opts)
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{
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const char *type = opts->format;
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for (size_t n = 0; n < sizeof(img_writers) / sizeof(img_writers[0]); n++) {
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const struct img_writer *writer = &img_writers[n];
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if (type && strcmp(type, writer->file_ext) == 0)
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return writer;
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}
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return &img_writers[0];
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}
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const char *image_writer_file_ext(const struct image_writer_opts *opts)
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{
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struct image_writer_opts defs = image_writer_opts_defaults;
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if (!opts)
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opts = &defs;
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return get_writer(opts)->file_ext;
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}
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int write_image(struct mp_image *image, const struct image_writer_opts *opts,
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const char *filename, struct mp_log *log)
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{
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struct mp_image *allocated_image = NULL;
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struct image_writer_opts defs = image_writer_opts_defaults;
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int d_w = image->params.d_w;
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int d_h = image->params.d_h;
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bool is_anamorphic = image->w != d_w || image->h != d_h;
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if (!opts)
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opts = &defs;
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const struct img_writer *writer = get_writer(opts);
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struct image_writer_ctx ctx = { log, opts, writer };
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int destfmt = IMGFMT_RGB24;
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if (writer->pixfmts) {
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destfmt = writer->pixfmts[0]; // default to first pixel format
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for (int *fmt = writer->pixfmts; *fmt; fmt++) {
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if (*fmt == image->imgfmt) {
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destfmt = *fmt;
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break;
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}
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}
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}
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// Caveat: no colorspace/levels conversion done if pixel formats equal
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// it's unclear what colorspace/levels the target wants
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if (image->imgfmt != destfmt || is_anamorphic) {
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struct mp_image *dst = mp_image_alloc(destfmt, d_w, d_h);
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mp_image_copy_attributes(dst, image);
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mp_image_swscale(dst, image, mp_sws_hq_flags);
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allocated_image = dst;
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image = dst;
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}
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FILE *fp = fopen(filename, "wb");
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int success = 0;
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if (fp == NULL) {
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mp_err(log, "Error opening '%s' for writing!\n", filename);
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} else {
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success = writer->write(&ctx, image, fp);
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success = !fclose(fp) && success;
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if (!success)
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mp_err(log, "Error writing file '%s'!\n", filename);
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}
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talloc_free(allocated_image);
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return success;
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}
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void dump_png(struct mp_image *image, const char *filename, struct mp_log *log)
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{
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struct image_writer_opts opts = image_writer_opts_defaults;
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opts.format = "png";
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write_image(image, &opts, filename, log);
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}
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