diff options
Diffstat (limited to 'ffprobe.c')
| -rw-r--r-- | ffprobe.c | 582 |
1 files changed, 377 insertions, 205 deletions
@@ -121,123 +121,165 @@ static char *ts_value_string (char *buf, int buf_size, int64_t ts) return buf; } +/* WRITERS API */ -struct writer { - const char *name; - const char *item_sep; ///< separator between key/value couples - const char *items_sep; ///< separator between sets of key/value couples - const char *section_sep; ///< separator between sections (streams, packets, ...) - const char *header, *footer; - void (*print_section_start)(const char *, int); - void (*print_section_end) (const char *, int); - void (*print_header)(const char *); - void (*print_footer)(const char *); - void (*print_integer)(const char *, int); - void (*print_string)(const char *, const char *); - void (*show_tags)(struct writer *w, AVDictionary *dict); -}; +typedef struct WriterContext WriterContext; +typedef struct Writer { + int priv_size; ///< private size for the writer context + const char *name; -/* JSON output */ + int (*init) (WriterContext *wctx, const char *args, void *opaque); + void (*uninit)(WriterContext *wctx); + + void (*print_header)(WriterContext *ctx); + void (*print_footer)(WriterContext *ctx); + + void (*print_chapter_header)(WriterContext *wctx, const char *); + void (*print_chapter_footer)(WriterContext *wctx, const char *); + void (*print_section_header)(WriterContext *wctx, const char *); + void (*print_section_footer)(WriterContext *wctx, const char *); + void (*print_integer) (WriterContext *wctx, const char *, int); + void (*print_string) (WriterContext *wctx, const char *, const char *); + void (*show_tags) (WriterContext *wctx, AVDictionary *dict); +} Writer; + +struct WriterContext { + const AVClass *class; ///< class of the writer + const Writer *writer; ///< the Writer of which this is an instance + char *name; ///< name of this writer instance + void *priv; ///< private data for use by the filter + unsigned int nb_item; ///< number of the item printed in the given section, starting at 0 + unsigned int nb_section; ///< number of the section printed in the given section sequence, starting at 0 + unsigned int nb_chapter; ///< number of the chapter, starting at 0 +}; -static void json_print_header(const char *section) +static void writer_close(WriterContext **wctx) { - printf("{\n"); + if (*wctx && (*wctx)->writer->uninit) + (*wctx)->writer->uninit(*wctx); + + av_freep(&((*wctx)->priv)); + av_freep(wctx); } -static char *json_escape_str(const char *s) +static int writer_open(WriterContext **wctx, const Writer *writer, + const char *args, void *opaque) { - static const char json_escape[] = {'"', '\\', '\b', '\f', '\n', '\r', '\t', 0}; - static const char json_subst[] = {'"', '\\', 'b', 'f', 'n', 'r', 't', 0}; - char *ret, *p; - int i, len = 0; + int ret = 0; - // compute the length of the escaped string - for (i = 0; s[i]; i++) { - if (strchr(json_escape, s[i])) len += 2; // simple escape - else if ((unsigned char)s[i] < 32) len += 6; // handle non-printable chars - else len += 1; // char copy + if (!(*wctx = av_malloc(sizeof(WriterContext)))) { + ret = AVERROR(ENOMEM); + goto fail; } - p = ret = av_malloc(len + 1); - if (!p) - return NULL; - for (i = 0; s[i]; i++) { - char *q = strchr(json_escape, s[i]); - if (q) { - *p++ = '\\'; - *p++ = json_subst[q - json_escape]; - } else if ((unsigned char)s[i] < 32) { - snprintf(p, 7, "\\u00%02x", s[i] & 0xff); - p += 6; - } else { - *p++ = s[i]; - } + if (!((*wctx)->priv = av_mallocz(writer->priv_size))) { + ret = AVERROR(ENOMEM); + goto fail; } - *p = 0; + + (*wctx)->writer = writer; + if ((*wctx)->writer->init) + ret = (*wctx)->writer->init(*wctx, args, opaque); + if (ret < 0) + goto fail; + + return 0; + +fail: + writer_close(wctx); return ret; } -static void json_print_str(const char *key, const char *value) +static inline void writer_print_header(WriterContext *wctx) { - char *key_esc = json_escape_str(key); - char *value_esc = json_escape_str(value); - printf(" \"%s\": \"%s\"", - key_esc ? key_esc : "", - value_esc ? value_esc : ""); - av_free(key_esc); - av_free(value_esc); + if (wctx->writer->print_header) + wctx->writer->print_header(wctx); + wctx->nb_chapter = 0; } -static void json_print_int(const char *key, int value) +static inline void writer_print_footer(WriterContext *wctx) { - char *key_esc = json_escape_str(key); - printf(" \"%s\": %d", key_esc ? key_esc : "", value); - av_free(key_esc); + if (wctx->writer->print_footer) + wctx->writer->print_footer(wctx); } -static void json_print_footer(const char *section) +static inline void writer_print_chapter_header(WriterContext *wctx, + const char *header) { - printf("\n }"); + if (wctx->writer->print_chapter_header) + wctx->writer->print_chapter_header(wctx, header); + wctx->nb_section = 0; } -static void json_print_section_start(const char *section, int multiple_entries) +static inline void writer_print_chapter_footer(WriterContext *wctx, + const char *footer) { - char *section_esc = json_escape_str(section); - printf("\n \"%s\":%s", section_esc ? section_esc : "", - multiple_entries ? " [" : " "); - av_free(section_esc); + if (wctx->writer->print_chapter_footer) + wctx->writer->print_chapter_footer(wctx, footer); + wctx->nb_chapter++; } -static void json_print_section_end(const char *section, int multiple_entries) +static inline void writer_print_section_header(WriterContext *wctx, + const char *header) { - if (multiple_entries) - printf("]"); + if (wctx->writer->print_section_header) + wctx->writer->print_section_header(wctx, header); + wctx->nb_item = 0; } +static inline void writer_print_section_footer(WriterContext *wctx, + const char *footer) +{ + if (wctx->writer->print_section_footer) + wctx->writer->print_section_footer(wctx, footer); + wctx->nb_section++; +} -/* Default output */ - -static void default_print_header(const char *section) +static inline void writer_print_integer(WriterContext *wctx, + const char *key, int val) { - printf("[%s]\n", section); + wctx->writer->print_integer(wctx, key, val); + wctx->nb_item++; } -static void default_print_str(const char *key, const char *value) +static inline void writer_print_string(WriterContext *wctx, + const char *key, const char *val) { - printf("%s=%s", key, value); + wctx->writer->print_string(wctx, key, val); + wctx->nb_item++; } -static void default_print_int(const char *key, int value) +static inline void writer_show_tags(WriterContext *wctx, AVDictionary *dict) { - printf("%s=%d", key, value); + wctx->writer->show_tags(wctx, dict); } -static void default_print_footer(const char *section) +#define MAX_REGISTERED_WRITERS_NB 64 + +static Writer *registered_writers[MAX_REGISTERED_WRITERS_NB + 1]; + +static int writer_register(Writer *writer) { - printf("\n[/%s]", section); + static int next_registered_writer_idx = 0; + + if (next_registered_writer_idx == MAX_REGISTERED_WRITERS_NB) + return AVERROR(ENOMEM); + + registered_writers[next_registered_writer_idx++] = writer; + return 0; } +static Writer *writer_get_by_name(const char *name) +{ + int i; + + for (i = 0; registered_writers[i]; i++) + if (!strcmp(registered_writers[i]->name, name)) + return registered_writers[i]; + + return NULL; +} /* Print helpers */ @@ -278,37 +320,237 @@ fail: return NULL; } -#define print_fmt0(k, f, ...) do { \ - if (fast_asprintf(&pbuf, f, __VA_ARGS__)) \ - w->print_string(k, pbuf.s); \ -} while (0) -#define print_fmt( k, f, ...) do { \ - if (w->item_sep) \ - printf("%s", w->item_sep); \ - print_fmt0(k, f, __VA_ARGS__); \ -} while (0) +/* WRITERS */ -#define print_int0(k, v) w->print_integer(k, v) -#define print_int( k, v) do { \ - if (w->item_sep) \ - printf("%s", w->item_sep); \ - print_int0(k, v); \ -} while (0) +/* Default output */ + +static void default_print_footer(WriterContext *wctx) +{ + printf("\n"); +} + +static void default_print_chapter_header(WriterContext *wctx, const char *chapter) +{ + if (wctx->nb_chapter) + printf("\n"); +} + +static void default_print_section_header(WriterContext *wctx, const char *section) +{ + if (wctx->nb_section) + printf("\n"); + printf("[%s]\n", section); +} + +static void default_print_section_footer(WriterContext *wctx, const char *section) +{ + printf("[/%s]", section); +} + +static void default_print_str(WriterContext *wctx, const char *key, const char *value) +{ + printf("%s=%s\n", key, value); +} + +static void default_print_int(WriterContext *wctx, const char *key, int value) +{ + printf("%s=%d\n", key, value); +} + +static void default_show_tags(WriterContext *wctx, AVDictionary *dict) +{ + AVDictionaryEntry *tag = NULL; + while ((tag = av_dict_get(dict, "", tag, AV_DICT_IGNORE_SUFFIX))) { + printf("TAG:"); + writer_print_string(wctx, tag->key, tag->value); + } +} + +static Writer default_writer = { + .name = "default", + .print_footer = default_print_footer, + .print_chapter_header = default_print_chapter_header, + .print_section_header = default_print_section_header, + .print_section_footer = default_print_section_footer, + .print_integer = default_print_int, + .print_string = default_print_str, + .show_tags = default_show_tags +}; + +/* JSON output */ + +typedef struct { + int multiple_entries; ///< tells if the given chapter requires multiple entries +} JSONContext; + +static char *json_escape_str(const char *s) +{ + static const char json_escape[] = {'"', '\\', '\b', '\f', '\n', '\r', '\t', 0}; + static const char json_subst[] = {'"', '\\', 'b', 'f', 'n', 'r', 't', 0}; + char *ret, *p; + int i, len = 0; + + // compute the length of the escaped string + for (i = 0; s[i]; i++) { + if (strchr(json_escape, s[i])) len += 2; // simple escape + else if ((unsigned char)s[i] < 32) len += 6; // handle non-printable chars + else len += 1; // char copy + } + + p = ret = av_malloc(len + 1); + if (!p) + return NULL; + for (i = 0; s[i]; i++) { + char *q = strchr(json_escape, s[i]); + if (q) { + *p++ = '\\'; + *p++ = json_subst[q - json_escape]; + } else if ((unsigned char)s[i] < 32) { + snprintf(p, 7, "\\u00%02x", s[i] & 0xff); + p += 6; + } else { + *p++ = s[i]; + } + } + *p = 0; + return ret; +} + +static void json_print_header(WriterContext *wctx) +{ + printf("{"); +} + +static void json_print_footer(WriterContext *wctx) +{ + printf("\n}\n"); +} + +static void json_print_chapter_header(WriterContext *wctx, const char *chapter) +{ + JSONContext *json = wctx->priv; + char *chapter_esc; + + if (wctx->nb_chapter) + printf(","); + json->multiple_entries = !strcmp(chapter, "packets") || !strcmp(chapter, "streams"); + chapter_esc = json_escape_str(chapter); + printf("\n \"%s\":%s", chapter_esc ? chapter_esc : "", + json->multiple_entries ? " [" : " "); + av_free(chapter_esc); +} + +static void json_print_chapter_footer(WriterContext *wctx, const char *chapter) +{ + JSONContext *json = wctx->priv; + + if (json->multiple_entries) + printf("]"); +} + +static void json_print_section_header(WriterContext *wctx, const char *section) +{ + if (wctx->nb_section) printf(","); + printf("{\n"); +} + +static void json_print_section_footer(WriterContext *wctx, const char *section) +{ + printf("\n }"); +} + +static inline void json_print_item_str(WriterContext *wctx, + const char *key, const char *value, + const char *indent) +{ + char *key_esc = json_escape_str(key); + char *value_esc = json_escape_str(value); + + printf("%s\"%s\": \"%s\"", indent, + key_esc ? key_esc : "", + value_esc ? value_esc : ""); + av_free(key_esc); + av_free(value_esc); +} + +#define INDENT " " + +static void json_print_str(WriterContext *wctx, const char *key, const char *value) +{ + if (wctx->nb_item) printf(",\n"); + json_print_item_str(wctx, key, value, INDENT); +} + +static void json_print_int(WriterContext *wctx, const char *key, int value) +{ + char *key_esc = json_escape_str(key); -#define print_str0(k, v) print_fmt0(k, "%s", v) -#define print_str( k, v) print_fmt (k, "%s", v) + if (wctx->nb_item) printf(",\n"); + printf(INDENT "\"%s\": %d", key_esc ? key_esc : "", value); + av_free(key_esc); +} +static void json_show_tags(WriterContext *wctx, AVDictionary *dict) +{ + AVDictionaryEntry *tag = NULL; + int is_first = 1; + if (!dict) + return; + printf(",\n" INDENT "\"tags\": {\n"); + while ((tag = av_dict_get(dict, "", tag, AV_DICT_IGNORE_SUFFIX))) { + if (is_first) is_first = 0; + else printf(",\n"); + json_print_item_str(wctx, tag->key, tag->value, INDENT INDENT); + } + printf("\n }"); +} -static void show_packet(struct writer *w, AVFormatContext *fmt_ctx, AVPacket *pkt, int packet_idx) +static Writer json_writer = { + .name = "json", + .priv_size = sizeof(JSONContext), + + .print_header = json_print_header, + .print_footer = json_print_footer, + .print_chapter_header = json_print_chapter_header, + .print_chapter_footer = json_print_chapter_footer, + .print_section_header = json_print_section_header, + .print_section_footer = json_print_section_footer, + .print_integer = json_print_int, + .print_string = json_print_str, + .show_tags = json_show_tags, +}; + +static void writer_register_all(void) +{ + static int initialized; + + if (initialized) + return; + initialized = 1; + + writer_register(&default_writer); + writer_register(&json_writer); +} + +#define print_fmt(k, f, ...) do { \ + if (fast_asprintf(&pbuf, f, __VA_ARGS__)) \ + writer_print_string(w, k, pbuf.s); \ +} while (0) + +#define print_int(k, v) writer_print_integer(w, k, v) +#define print_str(k, v) writer_print_string(w, k, v) +#define print_section_header(s) writer_print_section_header(w, s) +#define print_section_footer(s) writer_print_section_footer(w, s) +#define show_tags(metadata) writer_show_tags(w, metadata) + +static void show_packet(WriterContext *w, AVFormatContext *fmt_ctx, AVPacket *pkt, int packet_idx) { char val_str[128]; AVStream *st = fmt_ctx->streams[pkt->stream_index]; struct print_buf pbuf = {.s = NULL}; - if (packet_idx) - printf("%s", w->items_sep); - w->print_header("PACKET"); - print_str0("codec_type", av_x_if_null(av_get_media_type_string(st->codec->codec_type), "unknown")); + print_section_header("PACKET"); + print_str("codec_type", av_x_if_null(av_get_media_type_string(st->codec->codec_type), "unknown")); print_int("stream_index", pkt->stream_index); print_str("pts", ts_value_string (val_str, sizeof(val_str), pkt->pts)); print_str("pts_time", time_value_string(val_str, sizeof(val_str), pkt->pts, &st->time_base)); @@ -319,12 +561,13 @@ static void show_packet(struct writer *w, AVFormatContext *fmt_ctx, AVPacket *pk print_str("size", value_string (val_str, sizeof(val_str), pkt->size, unit_byte_str)); print_fmt("pos", "%"PRId64, pkt->pos); print_fmt("flags", "%c", pkt->flags & AV_PKT_FLAG_KEY ? 'K' : '_'); - w->print_footer("PACKET"); + print_section_footer("PACKET"); + av_free(pbuf.s); fflush(stdout); } -static void show_packets(struct writer *w, AVFormatContext *fmt_ctx) +static void show_packets(WriterContext *w, AVFormatContext *fmt_ctx) { AVPacket pkt; int i = 0; @@ -335,39 +578,7 @@ static void show_packets(struct writer *w, AVFormatContext *fmt_ctx) show_packet(w, fmt_ctx, &pkt, i++); } -static void json_show_tags(struct writer *w, AVDictionary *dict) -{ - AVDictionaryEntry *tag = NULL; - struct print_buf pbuf = {.s = NULL}; - int first = 1; - - if (!dict) - return; - printf(",\n \"tags\": {\n"); - while ((tag = av_dict_get(dict, "", tag, AV_DICT_IGNORE_SUFFIX))) { - if (first) { - print_str0(tag->key, tag->value); - first = 0; - } else { - print_str(tag->key, tag->value); - } - } - printf("\n }"); - av_free(pbuf.s); -} - -static void default_show_tags(struct writer *w, AVDictionary *dict) -{ - AVDictionaryEntry *tag = NULL; - struct print_buf pbuf = {.s = NULL}; - while ((tag = av_dict_get(dict, "", tag, AV_DICT_IGNORE_SUFFIX))) { - printf("\nTAG:"); - print_str0(tag->key, tag->value); - } - av_free(pbuf.s); -} - -static void show_stream(struct writer *w, AVFormatContext *fmt_ctx, int stream_idx) +static void show_stream(WriterContext *w, AVFormatContext *fmt_ctx, int stream_idx) { AVStream *stream = fmt_ctx->streams[stream_idx]; AVCodecContext *dec_ctx; @@ -376,11 +587,9 @@ static void show_stream(struct writer *w, AVFormatContext *fmt_ctx, int stream_i AVRational display_aspect_ratio; struct print_buf pbuf = {.s = NULL}; - if (stream_idx) - printf("%s", w->items_sep); - w->print_header("STREAM"); + print_section_header("STREAM"); - print_int0("index", stream->index); + print_int("index", stream->index); if ((dec_ctx = stream->codec)) { if ((dec = dec_ctx->codec)) { @@ -439,27 +648,27 @@ static void show_stream(struct writer *w, AVFormatContext *fmt_ctx, int stream_i if (stream->nb_frames) print_fmt("nb_frames", "%"PRId64, stream->nb_frames); - w->show_tags(w, stream->metadata); + show_tags(stream->metadata); - w->print_footer("STREAM"); + print_section_footer("STREAM"); av_free(pbuf.s); fflush(stdout); } -static void show_streams(struct writer *w, AVFormatContext *fmt_ctx) +static void show_streams(WriterContext *w, AVFormatContext *fmt_ctx) { int i; for (i = 0; i < fmt_ctx->nb_streams; i++) show_stream(w, fmt_ctx, i); } -static void show_format(struct writer *w, AVFormatContext *fmt_ctx) +static void show_format(WriterContext *w, AVFormatContext *fmt_ctx) { char val_str[128]; struct print_buf pbuf = {.s = NULL}; - w->print_header("FORMAT"); - print_str0("filename", fmt_ctx->filename); + print_section_header("FORMAT"); + print_str("filename", fmt_ctx->filename); print_int("nb_streams", fmt_ctx->nb_streams); print_str("format_name", fmt_ctx->iformat->name); print_str("format_long_name", fmt_ctx->iformat->long_name); @@ -467,8 +676,8 @@ static void show_format(struct writer *w, AVFormatContext *fmt_ctx) print_str("duration", time_value_string(val_str, sizeof(val_str), fmt_ctx->duration, &AV_TIME_BASE_Q)); print_str("size", value_string(val_str, sizeof(val_str), fmt_ctx->file_size, unit_byte_str)); print_str("bit_rate", value_string(val_str, sizeof(val_str), fmt_ctx->bit_rate, unit_bit_per_second_str)); - w->show_tags(w, fmt_ctx->metadata); - w->print_footer("FORMAT"); + show_tags(fmt_ctx->metadata); + print_section_footer("FORMAT"); av_free(pbuf.s); fflush(stdout); } @@ -515,83 +724,46 @@ static int open_input_file(AVFormatContext **fmt_ctx_ptr, const char *filename) return 0; } -#define WRITER_FUNC(func) \ - .print_header = func ## _print_header, \ - .print_footer = func ## _print_footer, \ - .print_integer = func ## _print_int, \ - .print_string = func ## _print_str, \ - .show_tags = func ## _show_tags - -static struct writer writers[] = {{ - .name = "default", - .item_sep = "\n", - .items_sep = "\n", - .section_sep = "\n", - .footer = "\n", - WRITER_FUNC(default), - },{ - .name = "json", - .header = "{", - .item_sep = ",\n", - .items_sep = ",", - .section_sep = ",", - .footer = "\n}\n", - .print_section_start = json_print_section_start, - .print_section_end = json_print_section_end, - WRITER_FUNC(json), - } -}; - -static int get_writer(const char *name) -{ - int i; - if (!name) - return 0; - for (i = 0; i < FF_ARRAY_ELEMS(writers); i++) - if (!strcmp(writers[i].name, name)) - return i; - return -1; -} - -#define SECTION_PRINT(name, multiple_entries, left) do { \ - if (do_show_ ## name) { \ - if (w->print_section_start) \ - w->print_section_start(#name, multiple_entries); \ - show_ ## name (w, fmt_ctx); \ - if (w->print_section_end) \ - w->print_section_end(#name, multiple_entries); \ - if (left) \ - printf("%s", w->section_sep); \ - } \ +#define PRINT_CHAPTER(name) do { \ + if (do_show_ ## name) { \ + writer_print_chapter_header(wctx, #name); \ + show_ ## name (wctx, fmt_ctx); \ + writer_print_chapter_footer(wctx, #name); \ + } \ } while (0) static int probe_file(const char *filename) { AVFormatContext *fmt_ctx; - int ret, writer_id; - struct writer *w; + int ret; + Writer *w; + WriterContext *wctx; + + writer_register_all(); - writer_id = get_writer(print_format); - if (writer_id < 0) { + if (!print_format) + print_format = av_strdup("default"); + w = writer_get_by_name(print_format); + if (!w) { fprintf(stderr, "Invalid output format '%s'\n", print_format); return AVERROR(EINVAL); } - w = &writers[writer_id]; - if ((ret = open_input_file(&fmt_ctx, filename))) + if ((ret = writer_open(&wctx, w, NULL, NULL)) < 0) return ret; - if (w->header) - printf("%s", w->header); - - SECTION_PRINT(packets, 1, do_show_streams || do_show_format); - SECTION_PRINT(streams, 1, do_show_format); - SECTION_PRINT(format, 0, 0); + if ((ret = open_input_file(&fmt_ctx, filename))) + return ret; - if (w->footer) - printf("%s", w->footer); + writer_print_header(wctx); + PRINT_CHAPTER(packets); + PRINT_CHAPTER(streams); + PRINT_CHAPTER(format); + writer_print_footer(wctx); av_close_input_file(fmt_ctx); + writer_close(&wctx); + return 0; } |