ref: 7a222d46af13cebae6695acf49753328d551739c
dir: /tools/output/output.c/
/* * Copyright © 2018, VideoLAN and dav1d authors * Copyright © 2018, Two Orioles, LLC * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "config.h" #include <assert.h> #include <errno.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include "output/output.h" #include "output/muxer.h" struct MuxerContext { MuxerPriv *data; const Muxer *impl; }; #define MAX_NUM_MUXERS 4 static const Muxer *muxers[MAX_NUM_MUXERS]; static unsigned num_muxers = 0; #define register_muxer(impl) { \ extern const Muxer impl; \ assert(num_muxers < MAX_NUM_MUXERS); \ muxers[num_muxers++] = &impl; \ } void init_muxers(void) { register_muxer(null_muxer); register_muxer(md5_muxer); register_muxer(yuv_muxer); register_muxer(y4m2_muxer); } static const char *find_extension(const char *const f) { const int l = strlen(f); if (l == 0) return NULL; const char *const end = &f[l - 1], *step = end; while ((*step >= 'a' && *step <= 'z') || (*step >= 'A' && *step <= 'Z') || (*step >= '0' && *step <= '9')) { step--; } return (step < end && step > f && *step == '.' && step[-1] != '/') ? &step[1] : NULL; } int output_open(MuxerContext **const c_out, const char *const name, const char *const filename, const Dav1dPictureParameters *const p, const unsigned fps[2]) { const Muxer *impl; MuxerContext *c; unsigned i; int res; if (name) { for (i = 0; i < num_muxers; i++) { if (!strcmp(muxers[i]->name, name)) { impl = muxers[i]; break; } } if (i == num_muxers) { fprintf(stderr, "Failed to find muxer named \"%s\"\n", name); return -ENOPROTOOPT; } } else { const char *ext = find_extension(filename); if (!ext) { fprintf(stderr, "No extension found for file %s\n", filename); return -1; } for (i = 0; i < num_muxers; i++) { if (!strcmp(muxers[i]->extension, ext)) { impl = muxers[i]; break; } } if (i == num_muxers) { fprintf(stderr, "Failed to find muxer for extension \"%s\"\n", ext); return -ENOPROTOOPT; } } if (!(c = malloc(sizeof(MuxerContext) + impl->priv_data_size))) { fprintf(stderr, "Failed to allocate memory\n"); return -ENOMEM; } c->impl = impl; c->data = (MuxerPriv *) &c[1]; if (impl->write_header && (res = impl->write_header(c->data, filename, p, fps)) < 0) { free(c); return res; } *c_out = c; return 0; } int output_write(MuxerContext *const ctx, Dav1dPicture *const p) { int res; if ((res = ctx->impl->write_picture(ctx->data, p)) < 0) return res; return 0; } void output_close(MuxerContext *const ctx) { if (ctx->impl->write_trailer) ctx->impl->write_trailer(ctx->data); free(ctx); } int output_verify(MuxerContext *const ctx, const char *const md5_Str) { int res = 0; if (ctx->impl->verify) res = ctx->impl->verify(ctx->data, md5_Str); free(ctx); return res; }