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chromium/chromium-131-el8-libavcodec...

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--- /dev/null 2024-11-22 07:51:33.845958571 +0100
+++ chromium-131.0.6778.85/third_party/ffmpeg/libavcodec/parser.h 2024-11-19 23:48:49.634320300 +0100
@@ -0,0 +1,58 @@
+/*
+ * AVCodecParser prototypes and definitions
+ * Copyright (c) 2003 Fabrice Bellard
+ * Copyright (c) 2003 Michael Niedermayer
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_PARSER_H
+#define AVCODEC_PARSER_H
+
+#include "avcodec.h"
+
+typedef struct ParseContext{
+ uint8_t *buffer;
+ int index;
+ int last_index;
+ unsigned int buffer_size;
+ uint32_t state; ///< contains the last few bytes in MSB order
+ int frame_start_found;
+ int overread; ///< the number of bytes which where irreversibly read from the next frame
+ int overread_index; ///< the index into ParseContext.buffer of the overread bytes
+ uint64_t state64; ///< contains the last 8 bytes in MSB order
+} ParseContext;
+
+#define END_NOT_FOUND (-100)
+
+/**
+ * Combine the (truncated) bitstream to a complete frame.
+ * @return -1 if no complete frame could be created,
+ * AVERROR(ENOMEM) if there was a memory allocation error
+ */
+int ff_combine_frame(ParseContext *pc, int next, const uint8_t **buf, int *buf_size);
+void ff_parse_close(AVCodecParserContext *s);
+
+/**
+ * Fetch timestamps for a specific byte within the current access unit.
+ * @param off byte position within the access unit
+ * @param remove Found timestamps will be removed if set to 1, kept if set to 0.
+ * @param fuzzy Only use found value if it is more informative than what we already have
+ */
+void ff_fetch_timestamp(AVCodecParserContext *s, int off, int remove, int fuzzy);
+
+#endif /* AVCODEC_PARSER_H */
--- /dev/null 2024-11-22 07:51:33.845958571 +0100
+++ chromium-131.0.6778.85/third_party/ffmpeg/libavcodec/parser.c 2024-11-19 23:48:49.633320000 +0100
@@ -0,0 +1,295 @@
+/*
+ * Audio and Video frame extraction
+ * Copyright (c) 2003 Fabrice Bellard
+ * Copyright (c) 2003 Michael Niedermayer
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <inttypes.h>
+#include <stdint.h>
+#include <string.h>
+
+#include "libavutil/avassert.h"
+#include "libavutil/mem.h"
+
+#include "parser.h"
+
+AVCodecParserContext *av_parser_init(int codec_id)
+{
+ AVCodecParserContext *s = NULL;
+ const AVCodecParser *parser;
+ void *i = 0;
+ int ret;
+
+ if (codec_id == AV_CODEC_ID_NONE)
+ return NULL;
+
+ while ((parser = av_parser_iterate(&i))) {
+ if (parser->codec_ids[0] == codec_id ||
+ parser->codec_ids[1] == codec_id ||
+ parser->codec_ids[2] == codec_id ||
+ parser->codec_ids[3] == codec_id ||
+ parser->codec_ids[4] == codec_id ||
+ parser->codec_ids[5] == codec_id ||
+ parser->codec_ids[6] == codec_id)
+ goto found;
+ }
+ return NULL;
+
+found:
+ s = av_mallocz(sizeof(AVCodecParserContext));
+ if (!s)
+ goto err_out;
+ s->parser = parser;
+ s->priv_data = av_mallocz(parser->priv_data_size);
+ if (!s->priv_data)
+ goto err_out;
+ s->fetch_timestamp=1;
+ s->pict_type = AV_PICTURE_TYPE_I;
+ if (parser->parser_init) {
+ ret = parser->parser_init(s);
+ if (ret != 0)
+ goto err_out;
+ }
+ s->key_frame = -1;
+ s->dts_sync_point = INT_MIN;
+ s->dts_ref_dts_delta = INT_MIN;
+ s->pts_dts_delta = INT_MIN;
+ s->format = -1;
+
+ return s;
+
+err_out:
+ if (s)
+ av_freep(&s->priv_data);
+ av_free(s);
+ return NULL;
+}
+
+void ff_fetch_timestamp(AVCodecParserContext *s, int off, int remove, int fuzzy)
+{
+ int i;
+
+ if (!fuzzy) {
+ s->dts =
+ s->pts = AV_NOPTS_VALUE;
+ s->pos = -1;
+ s->offset = 0;
+ }
+ for (i = 0; i < AV_PARSER_PTS_NB; i++) {
+ if (s->cur_offset + off >= s->cur_frame_offset[i] &&
+ (s->frame_offset < s->cur_frame_offset[i] ||
+ (!s->frame_offset && !s->next_frame_offset)) && // first field/frame
+ // check disabled since MPEG-TS does not send complete PES packets
+ /*s->next_frame_offset + off <*/ s->cur_frame_end[i]){
+
+ if (!fuzzy || s->cur_frame_dts[i] != AV_NOPTS_VALUE) {
+ s->dts = s->cur_frame_dts[i];
+ s->pts = s->cur_frame_pts[i];
+ s->pos = s->cur_frame_pos[i];
+ s->offset = s->next_frame_offset - s->cur_frame_offset[i];
+ }
+ if (remove)
+ s->cur_frame_offset[i] = INT64_MAX;
+ if (s->cur_offset + off < s->cur_frame_end[i])
+ break;
+ }
+ }
+}
+
+int av_parser_parse2(AVCodecParserContext *s, AVCodecContext *avctx,
+ uint8_t **poutbuf, int *poutbuf_size,
+ const uint8_t *buf, int buf_size,
+ int64_t pts, int64_t dts, int64_t pos)
+{
+ int index, i;
+ uint8_t dummy_buf[AV_INPUT_BUFFER_PADDING_SIZE];
+
+ av_assert1(avctx->codec_id != AV_CODEC_ID_NONE);
+
+ /* Parsers only work for the specified codec ids. */
+ av_assert1(avctx->codec_id == s->parser->codec_ids[0] ||
+ avctx->codec_id == s->parser->codec_ids[1] ||
+ avctx->codec_id == s->parser->codec_ids[2] ||
+ avctx->codec_id == s->parser->codec_ids[3] ||
+ avctx->codec_id == s->parser->codec_ids[4] ||
+ avctx->codec_id == s->parser->codec_ids[5] ||
+ avctx->codec_id == s->parser->codec_ids[6]);
+
+ if (!(s->flags & PARSER_FLAG_FETCHED_OFFSET)) {
+ s->next_frame_offset =
+ s->cur_offset = pos;
+ s->flags |= PARSER_FLAG_FETCHED_OFFSET;
+ }
+
+ if (buf_size == 0) {
+ /* padding is always necessary even if EOF, so we add it here */
+ memset(dummy_buf, 0, sizeof(dummy_buf));
+ buf = dummy_buf;
+ } else if (s->cur_offset + buf_size != s->cur_frame_end[s->cur_frame_start_index]) { /* skip remainder packets */
+ /* add a new packet descriptor */
+ i = (s->cur_frame_start_index + 1) & (AV_PARSER_PTS_NB - 1);
+ s->cur_frame_start_index = i;
+ s->cur_frame_offset[i] = s->cur_offset;
+ s->cur_frame_end[i] = s->cur_offset + buf_size;
+ s->cur_frame_pts[i] = pts;
+ s->cur_frame_dts[i] = dts;
+ s->cur_frame_pos[i] = pos;
+ }
+
+ if (s->fetch_timestamp) {
+ s->fetch_timestamp = 0;
+ s->last_pts = s->pts;
+ s->last_dts = s->dts;
+ s->last_pos = s->pos;
+ ff_fetch_timestamp(s, 0, 0, 0);
+ }
+ /* WARNING: the returned index can be negative */
+ index = s->parser->parser_parse(s, avctx, (const uint8_t **) poutbuf,
+ poutbuf_size, buf, buf_size);
+ av_assert0(index > -0x20000000); // The API does not allow returning AVERROR codes
+#define FILL(name) if(s->name > 0 && avctx->name <= 0) avctx->name = s->name
+ if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
+ FILL(field_order);
+ FILL(coded_width);
+ FILL(coded_height);
+ FILL(width);
+ FILL(height);
+ }
+
+ /* update the file pointer */
+ if (*poutbuf_size) {
+ /* fill the data for the current frame */
+ s->frame_offset = s->next_frame_offset;
+
+ /* offset of the next frame */
+ s->next_frame_offset = s->cur_offset + index;
+ s->fetch_timestamp = 1;
+ } else {
+ /* Don't return a pointer to dummy_buf. */
+ *poutbuf = NULL;
+ }
+ if (index < 0)
+ index = 0;
+ s->cur_offset += index;
+ return index;
+}
+
+void av_parser_close(AVCodecParserContext *s)
+{
+ if (s) {
+ if (s->parser->parser_close)
+ s->parser->parser_close(s);
+ av_freep(&s->priv_data);
+ av_free(s);
+ }
+}
+
+int ff_combine_frame(ParseContext *pc, int next,
+ const uint8_t **buf, int *buf_size)
+{
+ if (pc->overread) {
+ ff_dlog(NULL, "overread %d, state:%"PRIX32" next:%d index:%d o_index:%d\n",
+ pc->overread, pc->state, next, pc->index, pc->overread_index);
+ ff_dlog(NULL, "%X %X %X %X\n",
+ (*buf)[0], (*buf)[1], (*buf)[2], (*buf)[3]);
+ }
+
+ /* Copy overread bytes from last frame into buffer. */
+ for (; pc->overread > 0; pc->overread--)
+ pc->buffer[pc->index++] = pc->buffer[pc->overread_index++];
+
+ if (next > *buf_size)
+ return AVERROR(EINVAL);
+
+ /* flush remaining if EOF */
+ if (!*buf_size && next == END_NOT_FOUND)
+ next = 0;
+
+ pc->last_index = pc->index;
+
+ /* copy into buffer end return */
+ if (next == END_NOT_FOUND) {
+ void *new_buffer = av_fast_realloc(pc->buffer, &pc->buffer_size,
+ *buf_size + pc->index +
+ AV_INPUT_BUFFER_PADDING_SIZE);
+
+ if (!new_buffer) {
+ av_log(NULL, AV_LOG_ERROR, "Failed to reallocate parser buffer to %d\n", *buf_size + pc->index + AV_INPUT_BUFFER_PADDING_SIZE);
+ pc->index = 0;
+ return AVERROR(ENOMEM);
+ }
+ pc->buffer = new_buffer;
+ memcpy(&pc->buffer[pc->index], *buf, *buf_size);
+ memset(&pc->buffer[pc->index + *buf_size], 0, AV_INPUT_BUFFER_PADDING_SIZE);
+ pc->index += *buf_size;
+ return -1;
+ }
+
+ av_assert0(next >= 0 || pc->buffer);
+
+ *buf_size =
+ pc->overread_index = pc->index + next;
+
+ /* append to buffer */
+ if (pc->index) {
+ void *new_buffer = av_fast_realloc(pc->buffer, &pc->buffer_size,
+ next + pc->index +
+ AV_INPUT_BUFFER_PADDING_SIZE);
+ if (!new_buffer) {
+ av_log(NULL, AV_LOG_ERROR, "Failed to reallocate parser buffer to %d\n", next + pc->index + AV_INPUT_BUFFER_PADDING_SIZE);
+ *buf_size =
+ pc->overread_index =
+ pc->index = 0;
+ return AVERROR(ENOMEM);
+ }
+ pc->buffer = new_buffer;
+ if (next > -AV_INPUT_BUFFER_PADDING_SIZE)
+ memcpy(&pc->buffer[pc->index], *buf,
+ next + AV_INPUT_BUFFER_PADDING_SIZE);
+ pc->index = 0;
+ *buf = pc->buffer;
+ }
+
+ if (next < -8) {
+ pc->overread += -8 - next;
+ next = -8;
+ }
+ /* store overread bytes */
+ for (; next < 0; next++) {
+ pc->state = pc->state << 8 | pc->buffer[pc->last_index + next];
+ pc->state64 = pc->state64 << 8 | pc->buffer[pc->last_index + next];
+ pc->overread++;
+ }
+
+ if (pc->overread) {
+ ff_dlog(NULL, "overread %d, state:%"PRIX32" next:%d index:%d o_index:%d\n",
+ pc->overread, pc->state, next, pc->index, pc->overread_index);
+ ff_dlog(NULL, "%X %X %X %X\n",
+ (*buf)[0], (*buf)[1], (*buf)[2], (*buf)[3]);
+ }
+
+ return 0;
+}
+
+void ff_parse_close(AVCodecParserContext *s)
+{
+ ParseContext *pc = s->priv_data;
+
+ av_freep(&pc->buffer);
+}
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